A 725 m long train passes through a 235 m long tunnel in 48 seconds. Find the speed of the train.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. 72 km/h.
Total distance = 725 + 235 = 960 m
Time = 48 sec
Speed = = 20 m/sec
⇒ 20 × = 4 × 18 = 72 km/hr