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07-18-2016, 11:52 AM
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#141
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Senior Member
Join Date: Feb 2013
Location: Pfafftown NC
Posts: 2,353
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Quote:
Originally Posted by Iwritecode
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Yes but I can go 60 MPH for 1 minute and then stop.
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07-18-2016, 12:00 PM
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#142
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Site Team
Join Date: Sep 2014
Location: Northen IL
Posts: 8,288
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Quote:
Originally Posted by Evereddie
Yes but I can go 60 MPH for 1 minute and then stop.
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Then you will have traveled one mile.
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07-18-2016, 12:02 PM
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#143
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Senior Member
Join Date: Apr 2016
Location: Chelmsford, MA
Posts: 102
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Quote:
Originally Posted by Evereddie
Yes but I can go 60 MPH for 1 minute and then stop.
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Ok.... so let's go with that... If you go 60 MPH for 1 minute, then stop.. how far did you go? answer = 1 mile.
SO if your track is 1 mile long, and on the first half mile you averaged 30mph.. that means it took you a minute to complete that first half. No matter how fast you go for the second half you cannot average 60mph for the whole track, because you used up your minute in the first half.
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07-18-2016, 12:06 PM
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#144
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Senior Member
Join Date: Apr 2012
Location: Weatherford, TX
Posts: 977
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44
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07-18-2016, 12:09 PM
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#145
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Site Team - Lou
Join Date: Oct 2009
Location: South Eastern PA
Posts: 23,268
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07-18-2016, 12:14 PM
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#146
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Senior Member
Join Date: Jun 2013
Location: Between Pickles Gap and Toad Suck, AR
Posts: 6,070
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Quote:
Originally Posted by 172av8r
Ok.... so let's go with that... If you go 60 MPH for 1 minute, then stop.. how far did you go? answer = 1 mile.
SO if your track is 1 mile long, and on the first half mile you averaged 30mph.. that means it took you a minute to complete that first half. No matter how fast you go for the second half you cannot average 60mph for the whole track, because you used up your minute in the first half.
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Correct.
It can't be done, regardless of length of track. This is an old problem I gave my 8th grade math class around 1878 or so.
Like the Cree Light Guy says "If you argue with math, you will lose......"
Course, I blew the coconut problem...so I have zero street cred.......
LOL
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"American by Birth, Southern by the Grace of God"Lewis Grizzard
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07-18-2016, 12:35 PM
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#147
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Site Team - Lou
Join Date: Oct 2009
Location: South Eastern PA
Posts: 23,268
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Speaking of "My Head exploded", I found this.
You can actually COUNT the freaking bananas in this photo:
Apples, bananas and coconuts - Ask Professor Puzzler
Herk
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Lou & Freya the wonder dog
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07-18-2016, 12:38 PM
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#148
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Senior Member
Join Date: Jun 2013
Location: Between Pickles Gap and Toad Suck, AR
Posts: 6,070
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Quote:
Originally Posted by Herk7769
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But your last line has 3 items to ADD, and the OP's had a multiplication sign in place of one of the adds.
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"Next to prayer, fishing is the most personal relationship of man" Herbert Hoover
"American by Birth, Southern by the Grace of God"Lewis Grizzard
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2016 GMC Denali 3500Dually--2017 CC 36CKTS
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07-18-2016, 12:39 PM
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#149
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Senior Member
Join Date: Apr 2016
Location: Chelmsford, MA
Posts: 102
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Quote:
Originally Posted by Herk7769
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Yes, that's a clearer photo than the one in the OP. But it's not the exact same problem. (there's no multiplication in the one you linked).
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07-18-2016, 12:49 PM
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#150
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Site Team - Lou
Join Date: Oct 2009
Location: South Eastern PA
Posts: 23,268
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Quote:
Originally Posted by BandJCarm
But your last line has 3 items to ADD, and the OP's had a multiplication sign in place of one of the adds.
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I still could not count the OP's bananas.
I need new glasses ...
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Lou & Freya the wonder dog
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07-18-2016, 01:01 PM
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#151
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Senior Member
Join Date: Feb 2013
Location: Pfafftown NC
Posts: 2,353
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On the racetrack puzzler, now I see what's going on. It's clear that many of you discussing this appeared to have information that was simply not in the question. You knew the question from before or looked it up on the internet and didn't realize Herk phrased the question differently from it's original. He didn't say it was a mile long track but your explanations were figuring that in. No wonder.
__________________
There are 10 types of people in the world.
Those that know binary, and those that don't.
2013:31 / 2014:51 / 2015:58 / 2016:37 / 2017:46
2018:16
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07-18-2016, 01:02 PM
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#152
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Senior Member
Join Date: Apr 2008
Location: Edmonton.Alberta,Canada
Posts: 163
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Quote:
Originally Posted by 172av8r
Captn Mike is correct. Of course time factors into it. That's how you have to calculate average speed... Total distance / Total time. No matter what the total distance is, if the first half averaged 30 MPH, then there's no way you can achieve an average of 60MPH.
Assume the track is REALLY long... 60 miles. To average 60 MPH you have to drive the whole track in one hour.
But you drove the first half, (30 miles) at 30MPH, so it took you an hour to drive that half. But you need to drive the entire track in one hour! You have no time left to finish the next 30 miles.
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So 0 minutes!!
Can't be done like you say
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07-18-2016, 01:06 PM
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#153
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Senior Member
Join Date: Apr 2016
Location: Chelmsford, MA
Posts: 102
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Quote:
Originally Posted by Evereddie
On the racetrack puzzler. It's clear that many of you discussing this appeared to have information that was simply not in the question. You knew the question from before or looked it up on the internet and didn't realize Herk phrased the question differently from it's original. He didn't say it was a mile long track but your explanations were figuring that in. No wonder.
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No.. this is all from the information in the puzzle.
What's your answer? And how did you arrive at it without assuming some distance of the track. (even if you assume the track is n miles long, and use basic algebra to arrive at your answer, the conclusion will still be the same)
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07-18-2016, 01:06 PM
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#154
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Senior Member
Join Date: Jun 2013
Location: Brazoria County, Texas
Posts: 1,460
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Quote:
Originally Posted by 172av8r
Ok.... so let's go with that... If you go 60 MPH for 1 minute, then stop.. how far did you go? answer = 1 mile.
SO if your track is 1 mile long, and on the first half mile you averaged 30mph.. that means it took you a minute to complete that first half. No matter how fast you go for the second half you cannot average 60mph for the whole track, because you used up your minute in the first half.
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Everyone seems to be assuming that it will take the same time for each half. There is no set distance. There is no set time. There is a set relationship between the two and rate. The only thing we know about distance is that half is at one speed and half is at another. It doesn't matter what it is, just as long is it's half (.5). The rate of travel will also be a set number. We know two of these....30 for the first half, and 60 for the total. The time it takes to travel the two halves will be dependent on the rate of travel.
The rate for the first half plus the rate for the second half should be equal to 60.
30(.5) + X(.5) = 60
(30 + X ) X .5 = 60
30 + X = 60 / .5
30 + X = 120
X = 120 - 30
X = 90 mph
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07-18-2016, 01:09 PM
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#155
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Senior Member
Join Date: Apr 2016
Location: Chelmsford, MA
Posts: 102
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Quote:
Originally Posted by raspivey
Everyone seems to be assuming that it will take the same time for each half. There is no set distance. There is no set time. There is a set relationship between the two and rate. The only thing we know about distance is that half is at one speed and half is at another. It doesn't matter what it is, just as long is it's half (.5). The rate of travel will also be a set number. We know two of these....30 for the first half, and 60 for the total. The time it takes to travel the two halves will be dependent on the rate of travel.
The rate for the first half plus the rate for the second half should be equal to 60.
30(.5) + X(.5) = 60
(30 + X ) X .5 = 60
30 + X = 60 / .5
30 + X = 120
X = 120 - 30
X = 90 mph
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No. You can't add two rates to arrive at the average rate for the whole trip.
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07-18-2016, 01:11 PM
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#156
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Senior Member
Join Date: Jun 2013
Location: Brazoria County, Texas
Posts: 1,460
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Good point...I was already recalculating....I don't think it can be done without a set distance.
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07-18-2016, 01:13 PM
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#157
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Site Team
Join Date: Sep 2014
Location: Northen IL
Posts: 8,288
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Quote:
Originally Posted by raspivey
Good point...I was already recalculating....I don't think it can be done without a set distance.
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It's doesn't matter what distance you make it. 1 mile, 60 miles, 6 billion miles, it can't be done.
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07-18-2016, 01:13 PM
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#158
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Senior Member
Join Date: Jun 2013
Location: Between Pickles Gap and Toad Suck, AR
Posts: 6,070
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__________________
"Next to prayer, fishing is the most personal relationship of man" Herbert Hoover
"American by Birth, Southern by the Grace of God"Lewis Grizzard
FROG AR-0019-242
2016 GMC Denali 3500Dually--2017 CC 36CKTS
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07-18-2016, 01:20 PM
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#159
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Senior Member
Join Date: Apr 2008
Location: Edmonton.Alberta,Canada
Posts: 163
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Who is the smarty pants?
Quote:
Originally Posted by Herk7769
I still could not count the OP's bananas.
I need new glasses ...
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Does this help? Lol
Its probably my phone 😜
Edit: nope looks the same
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07-18-2016, 01:30 PM
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#160
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Senior Member
Join Date: Feb 2013
Location: Pfafftown NC
Posts: 2,353
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So if a plane is on a giant conveyor belt.....
__________________
There are 10 types of people in the world.
Those that know binary, and those that don't.
2013:31 / 2014:51 / 2015:58 / 2016:37 / 2017:46
2018:16
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