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Tom and Jerry are running on the same road towards each other. If Tom

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Tom and Jerry are running on the same road towards each other. If Tom  [#permalink]

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New post 30 Jun 2016, 07:48
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Tom and Jerry are running on the same road towards each other. If Tom is running at a speed of 2.5 meters per second and Jerry is running 36% slower, how much time will it take them to meet if the initial distance between the two is 50 meters and Tom started running 20 seconds before Jerry did?

A. 2 minute and 12 seconds.
B. two minutes.
C. 44 seconds.
D. 20 seconds.
E. 12 seconds.

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Tom and Jerry are running on the same road towards each other. If Tom  [#permalink]

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New post Updated on: 30 Jun 2016, 10:02
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Bunuel wrote:
Tom and Jerry are running on the same road towards each other. If Tom is running at a speed of 2.5 meters per second and Jerry is running 36% slower, how much time will it take them to meet if the initial distance between the two is 50 meters and Tom started running 20 seconds before Jerry did?

A. 2 minute and 12 seconds.
B. two minutes.
C. 44 seconds.
D. 20 seconds.
E. 12 seconds.


This is a Kiss problem in rate and distance.
Speed adds when when two objects come towards each other.
There is a time difference of 20 seconds in tom's favor==> meaning Tom will start running 20 seconds earlier than jerry.
Tom's speed is 2.5 m/second
Tom has started running 20 seconds earlier, so Tom will cover 2.5*20 = 50 metres , even before jerry started to run.
But the total distance between them is only 50 meter.
So TOM will end up running all the way to jerry and they they will meet in 20 seconds.
Poor TOM covering all the distance and jerry just sitting and enjoying his cheese at his location, not moving a centimetre.
Jerry would probably hit Tom with a frying pan :-D as soon as Tom reaches.

CORRECT ANSWER IS 20 SECONDS
OPTION D

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Originally posted by LogicGuru1 on 30 Jun 2016, 08:10.
Last edited by LogicGuru1 on 30 Jun 2016, 10:02, edited 1 time in total.
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Re: Tom and Jerry are running on the same road towards each other. If Tom  [#permalink]

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New post 30 Jun 2016, 09:19
Bunuel wrote:
Tom and Jerry are running on the same road towards each other. If Tom is running at a speed of 2.5 meters per second and Jerry is running 36% slower, how much time will it take them to meet if the initial distance between the two is 50 meters and Tom started running 20 seconds before Jerry did?

A. 2 minute and 12 seconds.
B. two minutes.
C. 44 seconds.
D. 20 seconds.
E. 12 seconds.


Tom is running alone for 20 seconds.

So he will cover a distance of 20*2.5 = 50 m in 20 seconds.

Basically, Jerry has not started yet , and Tom has covered the distance alone and met Jerry on the other side :)

D is the answer
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Re: Tom and Jerry are running on the same road towards each other. If Tom  [#permalink]

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New post 30 Jun 2016, 09:26
Yup .. 20 Seconds :) before jerry starts tom meets jerry :)
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Tom and Jerry are running on the same road towards each other. If Tom  [#permalink]

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New post 30 Jun 2016, 09:55
Jerry doesn't have to run !!
total distance covered by tom = 2.5*20 = 50 meters , which is equal to the initial distance between them.
time taken = 20 seconds
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Re: Tom and Jerry are running on the same road towards each other. If Tom  [#permalink]

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Re: Tom and Jerry are running on the same road towards each other. If Tom   [#permalink] 02 Feb 2018, 23:17
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