SOLUTION: If Sally can paint a house in 4 hours, and John can paint the same house in 6 hours, how long will it take for both of them to paint the house together?
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Question 421874: If Sally can paint a house in 4 hours, and John can paint the same house in 6 hours, how long will it take for both of them to paint the house together?
Thank you Found 2 solutions by edjones, sudhanshu_kmr:Answer by edjones(8007) (Show Source):
You can put this solution on YOUR website! Let t=time it takes them working together.
john does 1/6 the job in 1 hr and sally does 1/4.
1/4 + 1/6 = 1/t
3/12 + 2/12 = 5/12
t=12/5 hrs. working together.
.
Ed
