Assessment 7-2 A

Question

kilowatt hour means 1000 watts electricity are being used continuously for 1 hour. the electric utility company in Laura's town charges $0.06715 for each kilowatt hour used. Laura heats her house with three electric walls heaters that use 1200 watts each.

How much does it cost to heat her house for 1 day?

Answer 1

To solve this problem, we have to start by remembering how many hours are in a day: 24.

We know that one kilowatt hour is equal to 1000 watts for one hour.

Laura has these heating devices that use 1200 watts. Apparently they use that much every day (not every hour).

We have to divide 1,200 by 1,000 (the number of watts that can be used each hour to get one KwH) to get the number of kilowatt hours per hour:

1,200 / 1,000 = 1.2 KwH per hour

1.2 x 24 hours = 28.8 KwH per day

28.8 KwH per day x 0.06715 per KwH = $1.93 per day