SOLUTION: 7) A, B, & C can do a piece of work in 10, 9, 15 days respectively. They started the work together but C left after 2 days. In how many days will the remaining work be completed by

Algebra ->  Rate-of-work-word-problems -> SOLUTION: 7) A, B, & C can do a piece of work in 10, 9, 15 days respectively. They started the work together but C left after 2 days. In how many days will the remaining work be completed by      Log On


   

Question 839211: 7) A, B, & C can do a piece of work in 10, 9, 15 days respectively. They started the work together but C left after 2 days. In how many days will the remaining work be completed by A & B?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
2/10+2/9+2/15+x/10+x/9=1
x = 40/19
x = 2.1053
a little more than two days or about 2 days 2.5 hours