A water pump lifts a mass of $27 \times 10^3\,\text{kg}$ of water by a vertical height of $80\,\text{m}$ over a period of $1.0\,\text{hour}$. Calculate the average useful output power of the pump.
- A$0.60\,\text{kW}$
- B$5.9\,\text{kW}$
- C$36\,\text{kW}$
- D$350\,\text{kW}$