RRB ALP Mechanic Diesel 21 Jan 2019 Shift 1 Paper

Question : 80 of 175

Marks: +1, -0

A and B can do a certain work in 12 days, B & C can do the same work in 15 days, while A and C can do the same work. In 36 days. In how many days will all three together complete that work?