SOLUTION: A painter is paid 11 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 702543: A painter is paid 11 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.
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
m2/hr = rate of painting with roller
m2/hr = rate of painting with spray gun
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Cost painting m2 with roller:

Cost painting m2 wwith spray gun:

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Using the spay gun costs $27.50 less than using roller

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