P can do a work in 12 days. Q can do the same work in 10 days. If P and Q come together, both of them can complete the same work in how many days?

A can do a work in 4 days, B can do same work in 8 days, then the time taken by A and B to do the same work together is:

If 36 persons can finish 50% of work in 12 days In how many days 72 person can finish the complete work?

The construction work is assign to the Group-I of 7 workers. They complete the task in 12 days. The another Group-II started the same task with same number of workers. They started the work and just after 5th day their 2 workers left the work. Now, in how many days this Group will complete the task ?

Three men can complete a work in 6 days and 5 women can complete the same work in 18 days. In how many days can 4 men and 10 women together complete the same work ?

P, Q and R can complete a work in 12, 9 and 15 days respectively. Working together, they will complete the same work in:

X is twice as good a workman as Y and together they finish a piece of work in 18 days. In how many days will X alone finish the work?