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There are three sprinters on a racetrack. How much time will

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Value
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There are three sprinters on a racetrack. How much time will [#permalink] New post   19 Jun 2008, 04:32
00:00
A
B
C
D
E

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100% (00:00) correct 0% (00:00) wrong based on 1 sessions
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There are three sprinters on a racetrack. How much time will it take all three to finish an 800 meters race?

(1) The first runner can run the fastest, he runs at a 110% of the slowest runner.

(2) The slowest runner runs at a constant speed of 7 meters per second.



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Re: There are three sprinters on a racetrack. How much time will [#permalink] New post   19 Jun 2008, 06:47
I think it should be B – from there, we can say the time it will take the slowest sprinter finish the race. And we don’t need any info about other sprinters because all sprinters will finish the race in the same time the slowest one will finish.
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Re: There are three sprinters on a racetrack. How much time will [#permalink] New post   19 Jun 2008, 14:09
good catch. I went with E :( ... I thought we needed to figure out the time for each sprinter to finish ... shoot !
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Re: There are three sprinters on a racetrack. How much time will [#permalink] New post   19 Jun 2008, 22:39
good catch indeed... :-( went for E as well...
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Re: There are three sprinters on a racetrack. How much time will [#permalink] New post   20 Jun 2008, 03:59
B here

Typical C trap. Once you know the slowest runner's speed, you know how much time it will take all 3 to finish.
Value wrote:
There are three sprinters on a racetrack. How much time will it take all three to finish an 800 meters race?

(1) The first runner can run the fastest, he runs at a 110% of the slowest runner.

(2) The slowest runner runs at a constant speed of 7 meters per second.
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Re: There are three sprinters on a racetrack. How much time will [#permalink] New post   20 Jun 2008, 04:11
Hmmmmm a nice one. i also went for E initially thinking we will need the speed of all the three. :(



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This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
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Thank you for understanding, and happy exploring!
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Re: There are three sprinters on a racetrack. How much time will [#permalink]
20 Jun 2008, 04:11
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