A, B and C can do a piece of work in 20, 30 and 60 days respectively.…

Question

A, B and C can do a piece of work in 20, 30 and 60 days respectively. In how many days can A do the work if he is assisted by B and C on every third day?

Accepted Answer

Option B. 15 days. Answer & Solution Answer: Option B Solution: & A's\, 2\, day's\, work = 120 × 2 = 110 & ( A + B + C ) 's\, 1\, day's\, work & = 120 + 130 + 160 = 660 = 110 & Work\, done\, in\, 3\, days = 110 + 110 = 1/5 & Now,\,1/5\, work\, is\, done\, in\, 3\, days & Whole\, work\, will\, be\,…