SOLUTION: Mark working alone can do 2 jobs in m hours, and Bob working alone can do 2 jobs in b hours. How long will it take Mark and Bob to do one job if they work together?
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Question 1091243: Mark working alone can do 2 jobs in m hours, and Bob working alone can do 2 jobs in b hours. How long will it take Mark and Bob to do one job if they work together? Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! Mark's rate is
Bob's rate is
Add their individual rates to get
their rate working together
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Let = their time in hrs to do 1 job working together
Multiply both sides by
