A and B can do a piece of work in 72 days. B and C can do it in 120 days. A and C and do it in 90 days. If In how many days all three together can do the work?
(a) 80 days
(b) 100 days
(c) 60 days
(d) 150 days
Correct option (c) 60 days
Explanation:
Work done by (A+B+C) per day = 6 units/day
Total time taken by (A+B+C) = 360/6 =60 days
