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Question

A train of length 100 m is crossing a bridge 200 m long in length at the speed of 72 kmph. What is the time taken by the train to cross the bridge?


A
5 seconds
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B
10 seconds
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C
15 seconds
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D
20 seconds
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Solution

The correct option is A 15 seconds
Speed of train =72 kmph=72×518 ms1=20 ms1

Distance travelled to cross the bridge entirely:
=(100+200) m=300 m

Time taken to cross the bridge:
=300 m20 ms1=15 second

Physics

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