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Q.

Two trains are moving in the same direction at the speeds of 70 kmph and 90 kmph respectively. The faster train crosses a man sitting in the slower train in 36 sec. Find the length of the faster train.

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a

200 m

b

225 m 

c

250 m

d

100 m

answer is A.

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Detailed Solution

The relative speed =9070=20kmph

20×518m/s

The length of the faster train

=20×518×36=200meters

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