Question

A and B can do a piece of work in 10 days,B and C in 15 days,C and A in 18 days.In how many days can B alone do it?​

Answer 1

Answer:

A+B's one day work=I/10

B+C. I/i5

C+A ... 1/18

2A +2B+2C two days =

1/10+1/15 +1/18=9/90+6/90+5/90

= 20/90

A+B+C's one day work=20/180=1/9

B'alone=1/9-A+C

1/9-1/18=2/18 - 1/18

.Balone can do it in 18 days