A can complete a piece of work in 10 days, B in 15 days and C in 20 days. A and C worked together for 2 days and then A was replaced by B. In how many days, altogether, was the work completed?

35 women can do a work in 15 days. How many women would be required to do the same work in 25 days?

Vandana can do a piece of work in 25 days. Vasvi is 25% more efficient then Vandana. The number of days taken by Vasvi to do the same piece of work is:

$\frac{3}{4}$ part of the tank is filled by a motor pump in 15 minutes, then the rest part of the tank will be filled in

A and B can complete a piece of work in 30 days. B and C in 10 days, which C and A in 5 days. If all of them work together, the time taken in completing the work

P and Q together can do a piece of work in 60 days. Q and R together can do it in 120 days. P and R together can do it in 90 days. In what time can Q alone do the same work?

Mohan can dig a well in 15 days, Shyam is 25% better than Mohan. How many days does Shyam alone can take to dig the same well?