20. A 150 m long train is moving with a unitom velocity of 45 km/h. The time taken by the train to cross a bridge of length 850 m is
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vibhanshu8574:
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Answer:
Time taken= 1min8seconds
Explanation:
Speed of Train in Km/hr=45km/hr
so, it's speed in m/sec will be= 45×5÷18 =12.5m/sec.
Time taken by train to cross a bridge which is 850m long will be=850÷12.5
=68seconds=1min 8 seconds
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