If 3 men or 4 women or 6 boys can finish a work in 135 days workin 8 hours a day. The number of days taken by 12 men, 8 women or 18 boys working 12 hours a day will be.
Mohan and Sohan working separately can dig a trench in 10 days and 12 days respectively. If they work for 1 day alternately, Mohan begins it, in how many days Mohan will dug the trench ?
A and B can do a piece of work in 10 days and 15 days respectively. A alone starts the work. Then, 5 days after he is joined by B. In how many days, work will be completed ?