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A train speeds past a pole in 15 seconds and a platform 100 meter long in 25 seconds. What is length of the train ?

A. 140 meter

B. 145 meter

C. 150 meter

D. 155 meter

Correct Answer : C.


Let the length of the train is x meter and Speed of the train is y meter/second
Then x/y = 15 [because distance/speed = time]
=> y = 15/x
⇒x+10025=x15x=150 meters
So length of the train is 150 meters

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