GMAT Quantitative Reasoning Practice Test 4

Question : 68 of 100

Marks: +1, -0

At 12:10 o’clock Bill leaves point A towards point B at a speed of 30 km/h.
At 13:40 o’clock Richi leaves from the same point towards point B also, but at a speed of 60 km/h. At what time will Richi passes over Bill?

$14:40$
$15:10$
$16:10$
$15:40$
$15:30$

Validate

Solution:

13: 40

, Bill has already moved

(30 × 1.5) 45 {\km}

.
Their relative speed is

(60-30) 30 {\km} {/} {\h}

; therefore, it would take

45 {/} 30=1.5

hours to close the gap between the two.

13: 40+90

minutes are

15:10

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