GMAT Quantitative Reasoning Practice Test 5

Question : 13 of 100

Marks: +1, -0

Liz drove from point A to point B at 40 km/h. On her way back she drove at 50 km/h and therefore her way back lasted one hour less. What is the distance (in km) between A and B?

Validate

Solution:

The length of the road from

A

B

40 × X

, where

X

is the time. The road back is:

50(X-1)

. The road is the same length so

40 X

=50(X-1) → X=5

hours. The distance is

200 {\km}

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