Question

F a and b together can finish a piece of work in 20 days. B and c in 10 days and c and a in 12 days, then a, b, c jointly can finish the same work in

Answer 1

Answer:

first I will give you a hint still you didn't got then I will post answer

first find their one day works for a,b and,c and c,a. you will get equations .

add them then you'll get one day work of them