SOLUTION: Shawna can pour a large concrete driveway in 6 hours. Dan can pour the same driveway in 7 hours. Find how long it would take them if they worked together.
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Question 946009: Shawna can pour a large concrete driveway in 6 hours. Dan can pour the same driveway in 7 hours. Find how long it would take them if they worked together. Answer by amarjeeth123(570) (Show Source):
You can put this solution on YOUR website! In 1 hour Shawna can do 1/6 of the work.
In 1 hour Dan can do 1/7 of the work.
In 1 hour both of them can do (1/6+1/7) i.e.(13/42) of the work.
If they worked together they will take 42/13 hours i.e.3.23 hours
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