Q. 61 If 6 men and 8 boys can do a piece of work in 10 days and 26 men and 48 boys can do the same in 2 days, then the time taken by 15 men and 20 boys to do the same type of work will be

Q. 64 A and B can do a piece of work in 20 days and 12 days respectively. A started the work alone and then after 4 days. B joined him till the completion of the work. How long did the work last?

Q. 66 A labourer was appointed by a contractor on the condition that he would be paid Rs 75 for each day of his work but would be fined at the rate of Rs 15 per day for his absence, apart from losing his wages. After 20 days, the contractor paid the labourer Rs 1140. The number of days the labourer abstained from work was

Q. 67 40 men can complete a work in 40 days. They started the work together. But at the end of each 10th day, 5 men left this job. The work would have been completed in

(A) 56(2/3) days (B) 53(1/3) days (C) 52 days (D) 50 days

Q. 68 A is 50% as efficient as B. C does half of the work done by A and B together. If C alone does the work in 20 days, then A, B and C together can do the work in

(A) 5(2/3) days (B) 6(2/3) days (C) 6 days (D) 7 days

Q. 69 If the works done by (x – 1) men in (x + 1) days is to the work done by (x + 2) men in (x – 1) days are in the ratio 9 : 10 then the value of x is equal to

Q. 70 A, B and C can do a work separately in 16, 32 and 48 days respectively. They started the work together but B left off 8 days and C six days before the completion of the work. In what time is the work finished?

Q. 71 If 90 men can do a certain job in 16 days, working 12 hours per day, then the part of that work which can be completed by 70 men in 24 days, working 8 hours per day is

Q. 72 A and B working separately can do a piece of work in 9 and 15 days respectively. If they work for a day alternately, with A beginning, then the work will be completed in

Q. 73 A can do as much work as B and C together can do. A and B can together do a piece of work in 9 hours 36 minutes and C can do it in 48 hours. The time (in hours) that B needs to do the work alone, is

Q. 74 A and B can do a piece of work in 45 and 40 days respectively. They began the work together but A left after some days and B finished the remaining work in 23 days. A left after

Q. 75 A certain number of men can do a piece of work in 40 days. If there were 45 men more the work could have been finished in 25 days. Find the original number of men employed in the work.

Q. 76 16 women take 12 days to complete a work which can be completed by 12 men in 8 days. 16 men started working and after 3 days 10 men left and 4 women joined them. How many days will it take them to complete the remaining work?

Q. 77 A, B and C can do a piece of work in 30, 20 and 10 days respectively. A is assisted by B on one day and by C on the next day, alternately. How long would the work take to finish?

(A) 9(3/8) days (B) 4(3/8) days (C) 4(8/13) days (D) 3(9/13) days

Q. 78 8 men can do a work in 12 days. After 6 days of work, 4 more men were engaged to finish the work. In how many days would the remaining work be completed?

Q. 79 A and B can complete a piece of work in 12 and 18 days respectively. A begins to do the work and they work alternatively one at a time for one day each. The whole work will be completed in

(A) 14(1/3) days (B) 15(2/3) days (C) 16(1/3) days (D) 18(2/3) days

Q. 80 A and B can do a piece of work in 20 days and 12 days respectively. A started the work alone and then after 4 days, B joined him till the completion of the work. How long did the work last?