Question
A train is travelling at the rate of 72 km/hr. How many
seconds it will take to cover a distance of 2/5 km?Solution
Speed of train = 72 km/hr Speed of train in (m/sec) = 72 x 5/18 = 20 m/sec Distance = 2/5 of 1 km = 2/5 x 1000 m = 400 m Therefore, Speed = distance/time 20 = 400/t Time = 400/20 = 20 sec
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