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Does one get this sort of problem in GMAT? I hope not.

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Does one get this sort of problem in GMAT? I hope not.  [#permalink] New post 24 Sep 2004, 08:57
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Does one get this sort of problem in GMAT? I hope not.


Q28:
A car traveling at a certain constant speed takes 2 seconds longer to travel 1 kilometer than it would take to travel 1 kilometer at 75 kilometers per hour. At what speed, in kilometers per hour, is the car traveling?

A. 71.5
B. 72
C. 72.5
D. 73
E. 73.5
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 [#permalink] New post 24 Sep 2004, 12:47
B..
SInce it travels 75 km in 1 hr, hence 1 km it travels in 48 seconds. At the new speed it travels 1 km in 48+2 = 50 seconds. Hence the distance travelled in 1 hr or 3600 seconds is: 3600/50 = 72 km/hr...
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 [#permalink] New post 25 Sep 2004, 00:09
I accord cbrf3,
I have made this equation -
taken speed : X KM/H

(all are in form of timescale - Hour and time=distance 1KM / Speed)

1/X = 2/3600 + 1/75

X = 72 Km
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  [#permalink] 25 Sep 2004, 00:09
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