Q. 1 A does 60% of a work in 15 days. He then calls B, and they together ﬁnish the remaining work in 5 days. How long B alone would take to do the whole work?

Q. 9 Meghnad can do a piece of work in 45 hours. If he is joined by Jayshri, who is 50% more efficient, at what time will they together finish the work?

Q. 10 Painter ‘A’ can paint a house in 10 days and ‘B’ can do it in 20 days. With the help of ‘C’, they did the job in 5 days only. Then, ‘C’ alone can do the job in:

Q. 11 Abhinav is 2 times as good a workman as Balwant and therefore is able to finish a job in 36 days less than Balwant. Working together, they can do it in

Q. 12 A does 75% of a work in 25 days. He then calls in B and they together ﬁnish the remaining work in 5 days. How long B alone would take to do the whole work?

Q. 16 A and B together can do a piece of work in 36 days, B and C together can do it in 24 days. A and C together can do it in 18 days. The three working together can finish the work in

Q. 17 Suman can do a work in 3 days. Sumanta can do the same work in 2 days. Both of them finish the work together and get Rs 150. What is the share of Suman?

Q. 19 If 20 men working 8 hours per day can complete a piece of work in 21 days. How many hours per day must 48 men work to complete the same job in 7 days?

Q. 20 A and B together can finish a work in 30 days. They worked for it for 20 days and then B left the work. The remaining work was done by A alone in 20 days more. In how many days can A alone finish the work?