GMAT Quantitative Reasoning Practice Test 5

Question : 12 of 100

Marks: +1, -0

Car A travels at three times the average speed of car B. Car A started to travel at 12:00 o’clock, car B started to travel at 16:00 o’clock. What is the speed of car B (in km/h) if the total distance that both cars traveled until 18:00 was 1000 km?

Validate

Solution:

The speed of car B is

X

; the speed of car

A

3 X

Car A traveled

3 X × 6

hours

=18 X {\km}

.
Car B traveled

X × 2

hours

=2 X {\km}

1000=20 X → X=50 {\km} \/ {\h} .

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