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A car covers a certain distance in 45 mins if it runs at 60

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A car covers a certain distance in 45 mins if it runs at 60 [#permalink] New post 12 Feb 2004, 14:27
A car covers a certain distance in 45 mins if it runs at 60 mph and if the speed increases by two times tehn find the time taken to cover the same distance?
30
22 1/2min
20
none
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shubhangi

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 [#permalink] New post 12 Feb 2004, 14:31
15 mins. I thought the new speed to be 180 mph.
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 [#permalink] New post 12 Feb 2004, 14:34
my guess is ..there's no need to calculate.. its just logic.. if speed doubles then time will be half
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 [#permalink] New post 12 Feb 2004, 14:37
but the wording is "speed increases by two times" and not "speed doubled". Then in that case its 1/3 rd of the original time.
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 [#permalink] New post 12 Feb 2004, 14:41
rakesh1239 wrote:
15 mins. I thought the new speed to be 180 mph.


Man! your eyes are sharp as an Eagle :lol:

Last edited by kpadma on 12 Feb 2004, 15:04, edited 1 time in total.
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 [#permalink] New post 12 Feb 2004, 14:58
15 mins

Rakesh..that was a good catch...it still can be logically deduced.

You must be busy....coz I have not seen you around latley.

Vivek.
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 [#permalink] New post 12 Feb 2004, 15:00
Yeah Vivek, was very busy at my Job and uffffff this GMAT.
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 [#permalink] New post 12 Feb 2004, 15:47
How did you get 15 anyways..??
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 [#permalink] New post 12 Feb 2004, 16:00
distance is 45 miles and speed is 180 mph. Calculate the time taken.
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 [#permalink] New post 12 Feb 2004, 16:03
What is the source of this question? seems the editor is pretty weak in verbal like me.
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 [#permalink] New post 12 Feb 2004, 16:06
It was from a study material from a private tutorials..
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 [#permalink] New post 12 Feb 2004, 16:09
hmmmmmm...... thought so.
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 [#permalink] New post 12 Feb 2004, 19:44
rate = distance/time
distance = 60 * 45 = 2,700
120 mph = 2,700/t
t= 2,700/120 = 22.5
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 [#permalink] New post 13 Feb 2004, 01:25
22.5 is the answer, if speed becomes 120.
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 [#permalink] New post 13 Feb 2004, 07:38
that was good and very easy way piggybob.. how come i could'tn seee that ...?? :?:
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  [#permalink] 13 Feb 2004, 07:38
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A car covers a certain distance in 45 mins if it runs at 60

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