SOLUTION: Twin brothers, Billy and Bobby, can mow their grandparent's lawn together in 77 minutes. Billy could mow the lawn by himself in 35 minutes less time that it would take Bo
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Question 1134571: Twin brothers, Billy and Bobby, can mow their grandparent's lawn together in 77 minutes. Billy could mow the lawn by himself in 35 minutes less time that it would take Bobby. How long would it take Bobby to mow the lawn by himself?
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
Bobby's rate
Billy's rate
Combined rate -------------solve for .
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