Correct Answer - Option 2 : C

**Given:**

Speed of the metro train excluding stoppages = 60 km/hour

Speed of the metro train including stoppages = 48 km/hour

**Formula used:**

Speed = Distance/Time

**Calculation:**

According to question

Loss in speed when including stoppages = 60 − 48 = 12 km/hour

⇒ In 1-hour train covers 12 km less due to stoppages

Hence, the time in which the Train stops per hour

⇒ Time is taken to cover 12 km

Speed = Distance/Time

⇒ 60 = 12/Time

⇒ Time = 12/60 = 1/5 hour

⇒ Time = 1/5 × 60 = 12 minutes

**∴ The metro train stops 12 minutes every hour**