Question

An outdoor spa​ (hot tub) draws 1475 watts to keep the water warm. If the utility company charges ​$0.08 per​ kilowatt-hour, how much does it cost to operate the spa for four months during the winter​ (24 hours per​ day)? Assume each month has 30 days.

Answer 1

$339.84

Explanation:

Consumption per day in kilowatt-hour will be given by

24*1475/1000=35.4 kwh

Consumption per month will be

35.4*30=1062 kwh

For 4 months, electrical consumption will then be

4*1062=4248 kwh

Consumption in terms of money, considering the rate of $0.08 per​ kilowatt-hour

4248*0.08=$339.84

Therefore, the spa will pay $339.84