40.A,B, and C can complete a piece of work in 24,6 and 12 days respectively. Working together , they will complete the same work in
A. 1/24 day B. 7/24 day
C. 3x3/7 days D. 4 days
Answer:
(A+B+C)'s 1 day's work = (1/24+1/6+1/12)
= 7/24.
So, A,B and C together will complete the job in 24/7 = 3x3/7 days.
