Bunuel wrote:

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?

A. 14:40.

B. 15:10.

C. 16:10.

D. 15:40.

E. 15:30

R leaves 1.5 hrs after B. And, in these 1.5 hrs B will cover 45 Kms distance.

Relative speed= 60-30= 30 Km/hr (since both are walking in same direction)

Time that they will meet= 45/30 = 1.5 hrs after Richi started.

13:40 +1:30= 15:10

B is the answer

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