Question

Q.17 A train 280m long crosses the bridge 170m in 22.5 seconds. Find the speed to train km/hr.​

Answer 1

Answer:

Length of the train = 280 m

Length of the bridge = 170 m

Therefore, length of the train + length of the bridge = 280 m + 170 m = 450 m

Time taken by the train to cross the bridge = 22.5 sec = 45/2 sec.

Therefore, speed of train = 450 m/22.5 m/sec = 450/45/2 m/sec = 20 m/sec

To convert the speed from m/sec to km/hr, multiply by 18/5

Therefore, speed of the train = 20 × 18/5 km/hr = 72 km/hr

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