The length of platform and the train are equal If with a speed of 72kmph the train crosses the platf...........

Quantitative Aptitude (CDS) Problems on trains

The length of platform and the train are equal. If with a speed of 72kmph the train crosses the platform in 2 minute, then the length of the train (in metres)

1100m

1300m

1200m

1400m

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Explanation:

Speed =(72x5/18)m/sec = 20m/sec

Time = 2minute = 120sec

Let the length of the train and that of the platform be x metres.

Then,( 2x / 120)= 20

x= ( 20x120)/2 = 1200meter