SOLUTION: It takes bill 2 hours to plow the driveways on his street. It takes Carl 3 hours to plow the same driveways. How long would it take them if they worked together?
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Question 917377: It takes bill 2 hours to plow the driveways on his street. It takes Carl 3 hours to plow the same driveways. How long would it take them if they worked together? Answer by richwmiller(17219) (Show Source):
You can put this solution on YOUR website! 1/a+1/b=1/x
1/2+1/3=1/x
3/6+2/6=1/x
5/6=1/x
x=6/5
x=1.2 hours working together
check
x/a+x/b=1
x/2+x/3=1
1.2/2+1.2/3=1
0.6+0.4=1
1.0=1
ok
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