Question

A and b can finish a work in 15 days b and c can finish the same work in 12 days and c and a in 20 days. Than how many days a b and c together complete the work?

Answer 1

Answer:

we don't know the answer ok sis / bro........

Answer 2

A+b=1/15

B+C=1/12

C+a=1/20

adding both sides

2(A+B+C)

(1/15+1/12+1/20)

2(A+B+C) =1/5

A+B+C=1/10

together they will take 10 days