Question

A and B can together do a work in 10 days, B and C can do the same work in 12days , A and C can do the same work in 15days .how long each will take to do it seperately​

Answer 1

Answer:

(A+B) s, 1 day's work= 1/10

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

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

On adding,

2(A+B+C)

1 day's work= 1/10+1/12+1/15

6+5+4/60 = 1/4

∴(A+B+C) 1 day's work= 1/8

∴A 1 day's work= 1/8-1/12=3-2/24 = 1/24

∴A alone will complete the work in 24 days.