Question
A policeman noticed a thief from 300 m. The thief
started running and the policeman was chasing him. The thief and the policeman ran at speeds of 8 km/h and 9 km/h, respectively. What was the distance between them after 3 minutes?Solution
3 min = 3 x 60 = 180 seconds Distance between policeman and thief in starting = 300 m The relative speed of policeman and thief if same directions = (9-8) = 1 =1x (5/18) = (5/18) m/sec Distance covered in 180 seconds = (5/18) x 180 = 50 m Distance between them after 180 seconds 300-50 = 250 m The distance between them after 3 min is 250 m.
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