SOLUTION: 3. Keith and Nancy were able to wash a boat in 6 hours together. It takes Nancy 9 hours to do the same thing alone. Without help, how long would it take Keith to do the same thing?

Question 1047446: 3. Keith and Nancy were able to wash a boat in 6 hours together. It takes Nancy 9 hours to do the same thing alone. Without help, how long would it take Keith to do the same thing?
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
WASH A BOAT is one job, and this is done in some amounts of time. RATE UNIT should be as . Agents working together on a job work at the sum of their rates.

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