[PP Sub Inspector 17 Aug 2021]

1. If two trains are moving in the same direction, one with a speed of 12 m/s and of length 100m and second one with a speed of 18 m/s and of length 90m. How much time will it take one train to overtake (last compartment of one train is ahead of the engine of the other train) the other if both the trains start such that their engines are at the same position in the beginning?

1. 25 sec

2. 15 sec

3. 20 sec

4. 10 sec

Correct Answer :

15 sec