Two train leaves New Delhi at the same time. One travels

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Two train leaves New Delhi at the same time. One travels towards North at 60 km/h and the other travels towards South at 40 km/h . After how many hours will the trains be 150 km apart ?

1. 3/2 h
2. 4/3 h
3. 3/4 h
4. 15/2 h

Correct Option: A

Relative speed = 60 + 40 = 100 km/h
Time = Distance/speed = 150/ 00 = 3/2 h