Time and Work Excersize Problems and Answers

1. A can do a work in 15 days and B in 20 days. If they work on it together for 4 days, then the fraction of the work that is left is :
A. 1/4
B. 1/10
C. 7/15
D. 8/15
Explanation:    

2. P can finish a work in 18 days. Q can finish the same work in 15 days. Q worked for 10 days and left the job. how many days does P alone need to finish the remaining work?
A. 8
B. 5
C. 4
D. 6
Explanation:    

3. 3 men and 7 women can complete a work in 10 days . But 4 men and 6 women need 8 days to complete the same work . In how many days will 10 women complete the same work?
A. 50
B. 40
C. 30
D. 20
Explanation:    

4. A and B can finish a work 30 days if they work together. They worked together for 20 days and then B left. A finished the remaining work in another 20 days. In how many days A alone can finish the work?
A. 60
B. 50
C. 40
D. 30
Explanation:    

5. P is 30% more efficient than Q. P can complete a work in 23 days. If P and Q work together, how much time will it take to complete the same work?
A. 9
B. 11
C. 13
D. 15
Explanation:     

6. 10 men can complete a work in 7 days. But 10 women need 14 days to complete the same work. How many days will 5 men and 10 women need to complete the work?
A. 5
B. 6
C. 7
D. 8
Explanation:    

7. 45 men can complete a work in 16 days. Six days after they started working, 30 more men joined them. How many days will they now take to complete the remaining work?.
A. 4   
B. 6
C. 5   
D. 8
Explanation:    

8. A and B can together finish a work in 30 days. They worked at it for 20 days and then B left. The remaining work was done by A alone in 20 more days. A alone can finish the work in:
A. 48 days   
B. 54 days
C. 50 days   
D. 60 days
Explanation:    

9. A can do a certain job in 25 days which B alone can do in 20 days. A started the work and was joined by B after 10 days. The number of days taken in completing the wotk was
A. 12 and half days   
B. 15 days
C. 14 and 2/9 days   
D. 16 and 2/3 days
Explanation:    

10.  12 men can complete a work in 18 days. Six days after they started working, 4 men joined them. How many days will all of them take to finish the remaining work?
A. 9   
B. 12
C. 10   
D. 15
Explanation:    

11. A, B and C are employed to do a piece of work for Rs.529. A and B together are supposed to do 19/23 of the work and Band C together 8/23 of the work. What amount should A be paid?
A.  Rs.315   
B.  Rs.345
C.  Rs.355   
D.   Rs.375
Explanation:    

12. A and B together can do a piece of work in 30 days.A having worked for 16 days, B finishes the remaining work in 44 days. In how many days shall B finish the whole work alone?
A.  30 days   
B.  40 days
C.  60 days   
D.  70 days
Explanation:    

13. A and B together can complete a piece of work in 4 days. If A alone can complete the same work in 12 days. in how many days can b alone complete that work?
A.  1/3 days   
B.  1/6 days
C.   1/9 days   
D.  1/12 days
Explanation:    

14. Sakshi can do a piece of work in 20 days. Tanya is 25% more efficient than Sakshi. The number of days taken by Tanya to do the same piece of work is:
A.    15   
B.    16
C.    18   
D.    25
Explanation:     

15. A does half as much work as B in three-fourth of the time. If together they take 18 days to complete the work, how much time shall B take to do it (L.I.C. 1988)
A. 30 days   
B. 40 days
C. 35 days   
D. none of these
Explanation: