Question

A,B,C together finish a work in 4 days. If alone can finish the same work in 8 days and B in 12 days find how long will C take to finish​

Answer 1

A's 1 day of work = 1/8

B's 1 day of work = 1/12

(A+B+C)'s 1 day of work = 1/4

C's 1 day of work = 1/4 -(1/8+1/12)

= 1/24

Hence, C can finish the same work in 24 days.