Question
A thief is spotted by a policeman from a distance of 100 metres. When the policeman starts the chase, the thief also starts running . If the speed of the thief be 8 km/hr and that of the policeman 10 km/hr, how far the thief will have run before he is overtaken ?
Answer: Option A
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Relative speed of the policeman = (10 - 8) km/hr = 2 m/hr.
Time taken by policeman to cover 100 m = `(100/1000 xx 1/2) hr. = 1/20`hr.
In `1/20` hrs. the thief covers a distance of `(8 xx 1/20) km = 2/5 km` = 400 m.
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