Two trains are moving in the same direction at 72 kmph and 36 kmph. The faster train crosses a girl sitting at window seat in the slower train in 32 seconds. Find the length of the faster train ? Choose the correct choice from the following:  A) 170 m  B) 100 m  C) 270 m  D) 320 m  E) 350 m
Explanation:   Relative speed = (72 - 36) x 5/18 = 2 x 5 = 10 mps.   Distance covered in 32 sec = 32 x 10 = 320 m.   The length of the faster train = 320 m.   ANSWER IS 320 m
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Two trains are moving in the same direction at 72 kmph and 36 kmph. The faster train crosses a girl sitting at window seat in the slower train in 32 seconds. Find the length of the faster train ?