A train 108 m long moving at a speed of 50 km/hr crosses a train 112 m long coming from opposite direction in 6 seconds. The speed of the second train is:

Given

• Train A: length 108 m, speed 50 km/h.
• Train B: length 112 m, opposite direction, unknown speed v km/h.
• They cross in 6 s.

ComputeTotal length = 108 + 112 = 220 mRelative speed = 220 / 6 = 36.666... m/s = 36.666... × 18/5 = 132 km/hSo, 50 + v = 132 ⇒ v = 82 km/h