1. A can do a piece of work in 24 days and B can do the same work in 60 days. In how many days both A and B together can do the work ?
2. A can do a piece of work in 18 days and B in 60 days. If they work on it together for 8 days, then the fraction of the work that is left is:
3. 64 people take 36 days to dig a pond. If the pond would have to be dug in 48 days, then the number of people to be employed will be....
A) 48 B) 51 C) 36 D) 49
4. 60 men can build a wall 500 m long in 18 days, working 9 hours a day. What will be the number of days that 40 men will take to build a similar wall 800 m long, working 6 hours per day?
A) 64.8 B) 72.9 C) 65.8 D) 70.8
5. A can do a piece of work in 28 days and B in 48 days. They begin together but B leaves 5 days before the completion of the work. The whole work will be done in how many days?
6. A and B can do a piece of work in 80 days. B and C can do it in 120 days. A and C can do it in 100 days. In how many days can A alone do it?
7. Rahul can do a piece of work in 18 days. Tanu is 35% more efficient than Rahul. The number of days taken by Tanu to do the same piece of work is:
8. A, B and C can do a piece of work in 25 days, 35 days and 50 days respectively. They began the work together,but C left 5 days before the completion of the work. In how many days was the work completed?
9. A building is under construction and the task of paving the blocks is given to a group of men. 45 men can finish the given task in 81 days, working 10 hour/day. If 75 men take up the assignment and commit to finish it in 60 days, how many hours will they need to work per day?
A) 9.3 B) 7.6 C) 7.8 D) 8.1
10. A and B can do a piece of work in 40 days, while B and C can do the same work in 60 days and C and A in 80 days. They all work together for 16 days when B and C leave. How many days more will A take to finish the work?
A) 54.4 B) 53.6 C) 57.4 D) 58.6
11. 8 men can complete a work in 45 days. 8 women can complete the same work in 18 days. In how many days will 5 men and 8 women, together, complete the same work?
A) 15.6 B) 12.8 C) 13.6 D) 14.4
12. A man, a boy and a woman can finish a work in 10 days, 15 days and 30 days, respectively. In how many days can the work be finished by a man, a woman and a boy when all of them work together?
A) 5 B) 6 C) 8 D) 10
13. P is two times more efficient than Q. P is able to complete a piece of work in 40 days less than Q. Working together, the whole number of days taken by them to complete the work is: (Round off to the
nearest integer)
A) 28 B) 27 C) 25 D) 26
Key
1-C; 2-D; 3-A; 4-A; 5-D; 6-D; 7-B; 8-D; 9-D; 10-A ; 11-D; 12-A
