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1. If a 250 m long train crosses a platform of same length as that of the train in 25 seconds, then the speed of the train is:

A. 150 m/sec

B. 200 m/sec

C. 20 km/h

D. 72 km/h

Solution:

Speed of train
=

\frac{length of the train + length of platform}{Time}

\frac{250 + 250}{25}

= 20 m/sec
= 72 km/h

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