SOLUTION: Can you please answer this question: You paint 2 square yards of a community mural in 3 hours and a friend paints 4 square yards in 5 hours. How long does it take the two of y

Algebra ->  Conversion and Units of Measurement -> SOLUTION: Can you please answer this question: You paint 2 square yards of a community mural in 3 hours and a friend paints 4 square yards in 5 hours. How long does it take the two of y      Log On


   

Question 808813: Can you please answer this question:

You paint 2 square yards of a community mural in 3 hours and a friend paints 4 square yards in 5 hours. How long does it take the two of you to paint 11 square yards when working together?
Answer by TimothyLamb(4379) About Me  (Show Source):
You can put this solution on YOUR website!
y = 2/3 sq-yrd/hr
f - 4/5 sq-yrd/hr
y + f = 2/3 + 4/5
10/15 + 12/15 = 22/15 sq-yrd/hr
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t = a/r = 11 / (22/15)
11 * 15 / 22 = 7.5 hours
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