Multiple choice

Train ‘A’ running at speed of 54 km/hr crosses a platform of length same as that of the train in 36 sec. If train B, which is 250 meters long crosses the same platform in 25 sec, then find speed of train B (in km/hr)?

  1. 72.88

  2. 73.26

  3. 82.62

  4. 74.88

  5. none of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Let platform and train A length = L meters. Train A: 54 km/hr = 15 m/s. Distance = 2L, time = 36s, so 15 × 36 = 2L, L = 270m. Train B: length = 250m, crosses platform (270m) in 25s. Distance = 250 + 270 = 520m in 25s, speed = 520/25 = 20.8 m/s = 74.88 km/hr.

Keep practicing — related questions