PH-2061
Cost of electricity
Physics · Secondary 4 · Medium · Cost of electricity
A 1200 W water heater is switched on for 30 minutes each day. Electricity costs \$0.30 per kWh.
What is the cost of using the heater for one day?
What is the cost of using the heater for one day?
- \$0.18
- \$0.09
- \$0.36
- \.80
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