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You used a 1200 watt hair dryer for 10 minutes each day. If your town charges $0.15/kWh, what is the cost to use the hair dryer for a month?
Assume 30 days in the month.
a. $1.75
b. $0.25
c. $1.50
d. $0.90
2 Answers
- Coffee DrinkerLv 76 days agoFavorite Answer
1200 x 10 = 12,000 watt-minutes per day
12,000 watt-minutes/ 60 minutes per hour = 200 watt hours per day
200 watt hours / 1000 kw/watt = 0.2 kWh per day
0.2 x 30 = 6 kWh per month
6 x 0.15 = $0.90
- RichardLv 76 days ago
10 minutes = 1/6 hour
1200 watts X (1/6 hour) = 200 watt hours a day = 0.2 kilowatt hours a day
0.2 kwh/day X 30 days/month X $0.15/kwh = $ 0.90 / month
