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A train passes a platform in 40 sec and a woman standing on the platform in 30 sec. If the speed of the train is 108 km/hr, what is the length of the platform ?.

100 m
300 m
900 m
1020 m
Explanation:

Speed of the train =(108 * 5/18)=30 m/sec

Length of the train = Distance travelled to cross the woman x Time taken = (30 × 30) m = 900m.

Let the length of the platform be x meters.

Then, $\dfrac{(x+900)}{40}$=30

=>x+900=1200

=>x=300 m.
Additional Questions

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A train passes a platform in 40 sec and a woman standing on the platform in 30 sec. If the speed of the train is 108 km/hr, what is the length of the platform ?.

Answer
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