SOLUTION: A painter is paid 9 dollars per hour and can paint 8 m^2 with a roller in this time. Renting a spray gun costs 5 dollars for each hour of use, and the painter can paint 20 m^2 per

Question 254948: A painter is paid 9 dollars per hour and can paint 8 m^2 with a roller in this time. Renting a spray gun costs 5 dollars for each hour of use, and the painter can paint 20 m^2 per hour with the spray gun. It takes 1/2 an hour for the painter to clean up after using the roller, but 1 hour using the spray gun. You must pay the painter for her time and you must also pay for renting the spray gun for the total amount of time (including clean up) the spray gun was needed. How much money do you save by using the spray gun on a paint job that involves painting 40 m^2.
money saved= ____ dollars
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
by hand
40m^2/8m^2 by hand
9*(40/8+1/2)
9*(5.5)
$49.50
40m^2/20m^2 spray gun
9*(40/20+1)+ 5*(40/20+1)
(9+5)(40/20+1)
14*3=$42.00
49.5-42=$7.50 saved
It will cost that much in time to go rent it and return it and if you don't return it quickly it will eat up any savings.
The painter should have her own painting tools.
But where are you going to get a painter for $9 an hour?
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