If . then.?

If electricity costs 10 dollars per kilowatt - hour, how much does it cost to use 1 hp aircon for one month? The aircon is used 10 hours per day.

Answer:
10hoursx 30days x 740watts/1000 x10.00$

2,200 bucks.

you sure that's not 10 cents a kilowatt :P (22 bucks at 10cent a kilowatt)
What month?

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