A 725 m long train passes a tunnel 235 m long 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 travelled by the train = 725 + 235 = 960 m
Time taken = 48 seconds
Speed = 960/48 = 20 m/second which is equal to 20 × (18/5) = 72 km/h