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?

Algebra ->  Rate-of-work-word-problems -> 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?      Log On


   

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) About Me  (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 JOB%2FHOURS. Agents working together on a job work at the sum of their rates.

1%2Fk%2B1%2F9=1%2F6