A train's average speed is 72 km/h but is reduced to 60 km/h due to stoppages. For how much time does the train stop in an hour?

A train's average speed is 72 km/h.

72 km in 1 hour

72 km in 60 minutes

1 km in $$\frac{60}{72}$$ minutes

60 km in $$\frac{60}{72}\times60$$ minutes

60 km in 50 minutes    Eq.(i)

Reduced speed because of stoppages = 60 km/h

60 km in 1hour

60 km in 60 minutes    Eq.(ii)

From Eq.(i), we can say that without stoppages, the train can cover 60 km in 50 minutes. But from Eq.(ii), we can say that with stoppages, the train can cover 60 km in 60 minutes. It means that there is a stoppage of (60-50 = 10) minutes in each hour.