A 735 m long train passes through a 225 m long tunnel in 48 sec. Find the speed of the train.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2, i.e., 72 km/h.
Distance covered = Train length + Tunnel length = 735 + 225 = 960 m
Time = 48 sec
Speed = Distance ÷ Time = 960 ÷ 48 = 20 m/s
Convert to km/h: 20 × 18 ÷ 5 = 360 ÷ 5 = 72 km/h
Speed of train = 72 km/h