Correct Answer - Option 1 : 15 minutes

**Given:**

Speed of bus without stoppage is 48 km/h and with stoppage is 36 km/h

**Concept:**

Stoppage Time = Speed difference/speed of with stoppage

**Calculation:**

In the first 1 hr, the bus covers 48 km without stoppage and 36 km with stoppage

⇒ Stoppage time = time take to travel (48 - 36) = 12 km

⇒ Stoppage time = 12/48 hours

⇒ 1/4 hours = 15 minutes

**∴ The required result will be 15 min.**