Time and Work : 15 Questions Repeated in the Exams
1. A twice as good a workman as B and they together took 7 days to do a piece of work .B alone can dot it in
(a) 12 days
(b) 18 days
(c) 21 days
(d) None of these
2. A is thrice as good a workman as B. He is able to finish a piece of work in 60 days less than B. Find the time in which they can do it working together.
(a) 25 days
(b) 22 1/2 days
(c) 30 days
(d) 28 days
3.Twenty men can finish a piece of work in 30 days .after how many days should 5 men leave, so that the work may be finished in 35 days?
(a) 18 days
(b) 11 days
(c) 12 days
(d) 15 days
4.Two men and three women working 7 hours a day finish a piece of work in 5 days.Four men and four women working 3 hours a day complete the same work in 7 days . The number of days in which only 7 men working 4 hours a day will finish the work is
(a) 5 days
(b) 6 days
(c) 7 days
(d) 10 days
Ans 5 Days
5.Father is two times faster than his son. If father and son can complete a job in 12 days how long will it take for the son alone to complete the same job ?
(a) 24 days
(b) 36 days
(c) 27 days
(d) 30 days
6. 3 men can do a piece of work in 6 days. After 2 days 3 more men joined them. How many days will they take to complete the remaining work ?
(a) 5 days
(b) 4 days
(c) 3 days
(d) 2 days
7.How many days will 12 women take to do a piece of work which 10 men take 15 days to complete, if 3 women do as much work as 2 men?
(a) 18.33 days
(b) 18.55 days
(c) 18.75 days
(d) None of these
Ans 7. 18.75 days
8. If 12 men and 16 boys can do a piece of work in 5 days and 13 men and 24 boys can do it in 4 days, how long will 7 men and 10 boys take do it ?
(a) 10 days
(b) 12 days
(c) 8 1/3 days
(d) 11 1/4 days
9. A and B can do a job in 15 days and 10 days respectively .They begin the work together but A leaves after some days and B finishes the remaining work in 5 days . After how many days does A leaves?
(a) 2 days
(b) 3 days
(c) 4 days
(d) 5 days
Ans 3 days
10.A can do a piece of work in 15 days .If he is joined by B who is 50% more efficient, in what time will A and B finish the work?
(a) 4 days
(b) 8 days
(c) 6 days
(d) 10 days
Ans 10.
11. X does 1/4th of a job in 6 days. Y completes rest of the job in 12 days. In how many days could X and Y together have Complete the job ?
(a) 9 3/5 days
(b) 7 1/3 days
(c) 9 days
(d) 8 1/8 days
Ans 9 3/5 days
12. If 3 workers collect 48 kg of cotton in 4 days, How many kilograms of cotton will 9 workers collect in 2 days?
(a) 216
(b) 108
(c) 72
(d) 36
13. A can copy 80 pages in 20 hours. A and B together can copy 135 pages in 27 hours .In What time can B copy 30 pages?
(a) 30 hours
(b) 22.5 hours
(c) 24 hours
(d) 18 hours