The details below come from a test carried out on a petrol engine in a motor car. Power delivered: $150\,\text{kW}$ Fuel use: $20\,\text{litres per hour}$ Fuel energy content: $40\,\text{MJ per litre}$ Which expression can be used to find the efficiency of the engine?
- A$\dfrac{150 \times 10^3}{40 \times 10^6 \times 20 \times 60 \times 60}$
- B$\dfrac{150 \times 10^3 \times 60 \times 60}{20 \times 40 \times 10^6}$
- C$\dfrac{150 \times 10^3 \times 40 \times 10^6 \times 20}{60 \times 60}$
- D$\dfrac{150 \times 10^3 \times 20}{40 \times 10^3 \times 60 \times 60}$