# SOLUTION: If Sally can paint a house in 4 hours, and John can paint the same house in 6 hour, how long will it take for both of them to paint the house together?

Algebra ->  Algebra  -> Numeric Fractions Calculators, Lesson and Practice -> SOLUTION: If Sally can paint a house in 4 hours, and John can paint the same house in 6 hour, how long will it take for both of them to paint the house together?      Log On

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 Question 235462: If Sally can paint a house in 4 hours, and John can paint the same house in 6 hour, how long will it take for both of them to paint the house together?Answer by Alan3354(30993)   (Show Source): You can put this solution on YOUR website!If Sally can paint a house in 4 hours, and John can paint the same house in 6 hour, how long will it take for both of them to paint the house together? ------------ S does 1/4 house per hour J does 1/6 house per hour Together, they do 1/4 + 1/6 per hour = 3/12 + 2/12 = 5/12 house per hour --> 12/5 hours per house = 2.4 hours --------------- Use the shortcut for these, product/sum 4*6/(4+6) = 24/10 = 2.4