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Question

Find the time taken by a 150 m long train running at a speed of 60 km/hr to cross a pole.

A
9 seconds
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B
8 seconds
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C
9 hours
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D
9 minutes
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Solution

The correct option is A 9 seconds
Speed=Distance÷Time
Time=Distance÷Speed
Distance = Length of the train = 150 m
Speed = 60 km/hr
To convert speed to m/sec, multiply 60 by 5÷18
Speed of the train
= 60×518 = 503 m/sec
Hence, Time taken by the train to cross the pole = 150÷503 = 9 seconds

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