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Question

A railway train 100 m long passes over a bridge 400 m long at the rate of 72 kmh.How long will the train take to cross the bridge ?


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Solution

Step 1: Given

Length of the train = 100 m.

Length of the bridge =400 m.

total distance needs to be covered S=Length of the train + length of the bridge = 100 m+400 m =500 m.

Speed of train = 72 kmh or 20 ms.

Step 2: Formula.

Time =Distance speed .

Step 3.Calculation of time.

Time =Distance speed .

Time = 500 m20 ms.

Time = 25 seconds .

Hence, the time taken to cross the bridge = 25 seconds.


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