Multiple choice

A train 170 m long is running at a speed of 40 km/hr. In how much time will it cover the platform 130 m long ? A.30 sec B.24 sec C.15 sec D.27 sec E.None

  1. B

  2. D

  3. A

  4. E

  5. C
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Total distance = 170 + 130 = 300 m. Speed = 40 km/hr = 40 * 5/18 m/s = 200/18 = 100/9 m/s. Time = Distance / Speed = 300 / (100/9) = 300 * 9 / 100 = 27 seconds.

AI explanation

First convert the train's speed of 40 km/hr to m/s using the 5/18 conversion factor, yielding 100/9 m/s. When a train crosses a platform, the total distance is the train's length plus the platform's length, so add 170 m and 130 m to get 300 m. Divide the total distance of 300 m by the speed of 100/9 m/s to get 27 seconds. This means option D is the answer.

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