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Total No Of Questions: 30.
1) 10 men can do a work in 40 days. They started together but 4 men left after a few days. As a result the work was completed in 60 days. After how many days the 4 men left?

2) 2 men and 3 boys can do a piece of work in 8 days, 3 men and 2 boys can do it in 7 days. In how many days can 1 man and 2 boys do the same work?

3) P can complete a job in 15 days, Q in 10 days and R in 20 days. Q and R started the work together and were forced to leave after 4 days. Find the time taken by P to complete the remaining work?

4) P and Q can do a piece of work in 12 days and 20 days respectively. They started together and then P left after for some days. If Q finishes the remaining work in 12 days, how many days has P worked on it before leaving?

5) If 17 labourers can dig a ditch 26 meters long in 18 days, working 8 hours a day, how many more labourers should be engaged to dig a similar ditch of 52 meters length in 16 days, each labourer working 9 hours a day?

6) P can do a job in 10 days, Q can do it in 12 days and R can do it in 15 days. All begin together, but P leaves the work after 2 days and Q leaves 3 days before the work is completed. How long did the work last?

7) 8 men and 20 boys can construct a house in 5 days working for 6 hours a day. 5 men and 8 boys can construct two such houses in 16 days working for 7.5 hours a day. In how many days can 12 men and 6 boys construct 5 such houses working for 10 hours a day?

8) A job can be completed by 10 men in 20 days and by 40 women in 15 days. How many days it takes for 5 men and 5 women to finish the work?

9) P can do a piece of work in 80 days. He works at it for 10 days and then Q alone finishes the work in 42 days. Both together could complete the work in how many days?

10) 80 men can finish 5/2 of work in 30 days. How many men are required to finish the remaining work in 60 days?
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