SOLUTION: If one person digs a trench in 5 hours, and another person digs a trench in 6 hours, how many hours will it take both of them to dig one trench?

Algebra ->  Rate-of-work-word-problems -> SOLUTION: If one person digs a trench in 5 hours, and another person digs a trench in 6 hours, how many hours will it take both of them to dig one trench?      Log On


   

Question 752523: If one person digs a trench in 5 hours, and another person digs a trench in 6 hours, how many hours will it take both of them to dig one trench?
Answer by checkley79(3341) About Me  (Show Source):
You can put this solution on YOUR website!
1/5+1/6=1/x
(6+5)/5*6=1/x
11/30=1/x
11x=30
x=30/11
x=2.73 hours ans.