What is the total cost of using the following at 9¢ per kilowatthour?
Tuesday, August 17th, 2010 at
5:58 pm
What is the total cost of using the following at 9¢ per kilowatthour?
a. 860 W air conditioner for 6 h
b. 4800 W clothes dryer for 30 min
c. 900 W coffee maker for 20 min
d. 110 W stereo for 3.5 h
Tagged with: air conditioner • c 900 • clothes dryer • coffee maker
Filed under: Coffee
Like this post? Subscribe to my RSS feed and get loads more!
860 J/s * 21600 s = 18576000 J
480 J/s * 1800 s = 8640000 J
900 J/s * 1200 s = 1080000 J
110 J/s * 12600 s = 1386000 J
Total = 29682000 J
1 kwh = 1000 J/s * 3600 s = 3600000 J
Cost = $0.09 per 3600000 J
Actual Cost = 29682000 J / 3600000 J * $0.09 = 74.2 Cents