1. A thief is stopped by a policeman from a distance of 350 metres. When the policeman starts the chase, the thief also starts running. Assuming the speed of the thief as 5 km/h and that of the policeman as 7 km/h, how far the thief would have run, before he is over-taken?
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By: anil on 05 May 2019 02.16 am
Since the thief is escaping from the police man, thus they both are running in same direction. Speed of thief = 5 km/hr and speed of policeman = 7 km/hr => Relative speed = 7 - 5 = 2 km/hr Distance between them = 350 metres = 0.35 km => Time taken = $$frac{distance}{speed}$$ = $$frac{0.35}{2} = frac{7}{40}$$ hr $$ herefore$$ Distance covered by thief before he was caught = $$5 imes frac{7}{40}$$ = 0.875 km = 875 metres => Ans - (A)
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