The train is 62 cm long and travels at a speed of 18cm/s. It takes 4 seconds for the whole of the train to cross a bridge. Calculate the length of the bridge.
Answers
Given info : The train is 62 cm long and travels at a speed of 18cm/s. It takes 4 seconds for the whole of the train to cross a bridge.
To find : Calculate the length of the bridge.
solution : let the length of the bridge is x cm.
here when the train cross the bridge, distance covered by it = length of train + length of bridge = 62cm + x cm
speed = distance covered by train/time taken
⇒18 cm/s = (62 + x)/4
⇒18 × 4 = 62 + x
⇒72 = 62 + x
⇒x = 10 cm
Therefore the length of the bridge is 10cm.
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