Question

A train which is 820 m long is running at 126 kmph. In how much time will the train cross a tunnel which is 580 m long?
1. 40 sec
2. 30 sec
3. 45 sec
4. 50 sec

Answer 1

Correct Answer - Option 1 : 40 sec

Given:

Length of train = 820 m

Speed of train = 126 kmph

Length of tunnel = 580 m

Calculations:

Speed of train = 126 kmph = 126 × 5/18 m/s = 35 m/s

Time taken to cross the tunnel

⇒ T = time taken to cover (820 + 580) m

⇒ T = 1400/35

⇒ T = 40 sec

Time taken by the train to cross a tunnel which is 580 m long is 40 sec.