Question 52
A train 400 m long passes a pole in 20 seconds. What is the speed of the train?
Solution
Length of the train = 400 m
Time taken by the train to cross a pole is the time taken by the train to cross its length
Speed of the train = $$\dfrac{400}{20} = 20 m/sec = 20 \times \dfrac{18}{5} = 72 km/hr$$
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