Q.

A thief is running away on a straight road in a jeep moving with a speed of 9 ms-1. A policeman chases him on a motor cycle moving at a speed of 10 ms-1. If the instantaneous separation of the jeep from the motor cycle is 100 m, how long will it take for the policeman to catch the thief?

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a

1 s

b

19 s

c

90 s

d

100 s

answer is D.

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Detailed Solution

Relative velocity of policeman w.r.t. the thief is 10−9=1ms−1. Since the relative separation between them is 100 m, the time taken will be = relative separation/relative velocity = 100/1 = 100 s.
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