SOLUTION: A mason can build a wall in 10 hours. An apprentice can build a wall in 15 hours. How long would it take them to build the wall if they worked together?

Algebra ->  Rate-of-work-word-problems -> SOLUTION: A mason can build a wall in 10 hours. An apprentice can build a wall in 15 hours. How long would it take them to build the wall if they worked together?      Log On


   

Question 313993: A mason can build a wall in 10 hours. An apprentice can build a wall in 15 hours. How long would it take them to build the wall if they worked together?
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
1/10+1/15=1/x
(15+10)/10*15=1/x
25/150=1/x
1/6=1/x
x=6 hours ans. when they work together,