SOLUTION: If John completes 5 tasks in 15 minutes and Bob completes 5 tasks in 35 minutes, how long will it take them to complete 5 tasks if they work together?
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Question 768615: If John completes 5 tasks in 15 minutes and Bob completes 5 tasks in 35 minutes, how long will it take them to complete 5 tasks if they work together?
Answer by oscargut(2103) (Show Source): You can put this solution on YOUR website!
1/(1/15+1/35) = 10.5
Answer: 10.5 minutes
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