Excluding stoppages, the speed of a bus is $54 \text{ km/h}$ and including stoppages, it is $45 \text{ km/h}$. For how many minutes does the bus stop per hour?
Options:
- A: $9 \text{ min}$
- B: $10 \text{ min}$
- C: $12 \text{ min}$
- D: $15 \text{ min}$
Related Practice Questions:
Loading Preview