A train passes a station platform in 36 sec and a man standing on the platform in 20 sec If the spee...........

Quantitative Aptitude ( CCS) Problems on trains

A train passes a station platform in 36 sec and a man standing on the platform in 20 sec. If the speed of the train is 54 km/hr, find the length of the platform.

240 m

680 m

360 m

720 m

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Explanation:

Speed of the train is 54 × 5 / 18 = 15 m/s.
Length of the train is 20 × 15 = 300 m.
Length of platform + train = 36 × 15 = 540 m.
So the length of the platform is 540 – 300 = 240 m.

Hence, option 1 is the correct answer.

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