Question

Excluding stoppages, the average speed of a bus is 48 km/h and including stoppage the average speed of the bus is 36 km/h for how many minutes bus stop per hour?
1. 15 minutes
2. 25 minutes
3. 35 minutes
4. 45 minutes

Answer 1

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.