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 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
E N72.00

waec 1993 physics

The correct answer is A. N7.20

E = 200 x 30 x 24 Wh = 144000; Wh = 144KWh

Cost 144 x 5k = N7.20

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