Multiple choice

The speed of train A and B is 126" " km/h and 288" " km/h respectively. B crosses A in 22 seconds while both are running in the same directions. If length of B is 250" " m more than A, what will be the time (in sec) taken by A to cross a platform of length 505" " m ?

  1. 26

  2. 28

  3. 20

  4. 25
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Relative speed in same direction = 288 - 126 = 162 km/h = 45 m/s. In 22 seconds, B covers A + (A + 250) = 990 m, so A's length = 370 m. A crosses 505 m platform: distance = 370 + 505 = 875 m. Time = 875 ÷ 35 = 25 seconds.

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