A household refrigerator consumes electrical energy at the rate of 200 W. lf electricity costs
PHYSICS
WAEC 1993
A household refrigerator consumes electrical energy at the rate of 200 W. lf electricity costs 5 k per kWh, calculate the cost of operating the appliance for 30 days.
- A. N7.20
- B. N12.00
- C. N30.00
- D. N33.33
Correct Answer: A. N7.20
Explanation
E = 200 x 30 x 24 Wh = 144000; Wh = 144KWh Cost 144 x 5k = N7.20
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