Multiple choice

A 100 m long train moving at the speed of 30 m/sec. crosses another 120 m long train coming from opposite direction in 6 seconds.What is the speed of second train?

  1. 13 km/hr

  2. 80 km/hr

  3. 60 km/hr

  4. 50 km/hr

  5. None of these

Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Total distance = 100 + 120 = 220 m. Time = 6 seconds. Relative speed = 220/6 = 36.67 m/s. If train 1 speed = 30 m/s, then train 2 speed = 36.67 - 30 = 6.67 m/s (since opposite directions). Converting: 6.67 m/s × 18/5 = 24 km/hr. Checking options: 13, 80, 60, 50 km/hr - none match 24 km/hr, so answer is E.