Question

a, b, c can do a work in 8 days. b,c can do it 20 days. b,c can do it in
20 days. in what time can c alone do it​

Answer 1

Explanation:

how many days working alone?

A can do a piece of work in 10 days, and B can do the same work in 20 days. With the help of C, they finished the work in 4 days. C can do the work in how many days, working alone? Explanation:Their combined 4 day work = 4(1/10 + 1/15) = 12/20 = 3/5.