A $100\,\text{W}$ lamp is left on for five hours each day over three weeks. Each unit of electricity costs $\$0.24$. What is the cost of using the lamp for this period?
- A$\$0.36$
- B$\$0.84$
- C$\$2.52$
- D$\$25.20$
Physics 5054 · O Level · Power
Physics 5054 · O Level · Power
A $100\,\text{W}$ lamp is left on for five hours each day over three weeks. Each unit of electricity costs $\$0.24$. What is the cost of using the lamp for this period?