Question

A and B together can do a piece of work in 12 days B and C work in 12 days and C and B can do it in 15 days in 20 days in how many days it will take to complete the work​

Answer 1

10 days is the ans

Step-by-step explanation:

(A+B)'s 1 day work=1/12

(B+C)'s 1 day work =1/15

(C+B)'s 1 day work=1/20

2(A+B+C)'s 1 day work =1/12+1/15+1/20

= 5+4+3/60

=12/60*1/2

=12/120

=1/10

=10 days