Correct Answer - Option 1 :

\(\frac{3}2\)
**Given:**

One travels north at 60 Kmph and the other travels south at 40 Kmph.

**Formula used:**

Time = Distance/Speed

**Calculation:**

Trains running opposite direction,

Then both train speed must be add

Total speed = (60 + 40) kmph

Distance = 150 km

According to the question,

Time = 150/100

⇒ T = 3/2

**∴ 3/2 hours will the train be 150 km apart.**