A lorry needs $15\,\text{minutes}$ to move along the route $P Q R S$. What is the lorry’s average speed?
- A$4.0\,\text{km h}^{-1}$
- B$22\,\text{km h}^{-1}$
- C$48\,\text{km h}^{-1}$
- D$64\,\text{km h}^{-1}$
Physics 5054 · O Level · Motion
Physics 5054 · O Level · Motion
A lorry needs $15\,\text{minutes}$ to move along the route $P Q R S$. What is the lorry’s average speed?