A is twice as good a workman as B and together they finish a piece of work in 14 days. The number of days that A alone will take to finish the work is:

8 men and 3 boys together can complete a piece of work in 5 days. If 5 boys can complete the same piece of work in 15 days, in how many days do 5 men complete the same piece of work?

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

P alone can do a piece of work in 5 days and Q alone in 4 days. P and Q undertook to do it for Rs. 3000. With the help of R they completed the work in 2 days. How much is to be paid to R?

A can do a certain work in 12 days. B is 60% more efficient than A. How many days does B alone take to do the same work ?

Nine boys can complete a work in 360 days, 18 men can complete the same work in 72 days and 12 women can complete it in 162 days. In how many days, can 4 men, 12 women and 10 boys together, complete the work ?

Mohan asked 36 men to build his house in 30 day. 50% of the work got completed in just 10 days. So, Mohan removed some workers. Now, how many persons does he need to complete the remaining work in decided time?