Daily Updates

Time and Work
  • 2016-07-08
Time and Work


 1.A and B can do a work in 12 days, B  and C in 15 days and C and A in 20 days. If A,B and C work together , they will complete the work in :

(1)5 days               (2)7 5/6 days          

 (3)10 days             (4)15 3/5 days

2. A can do a piece of work in 4 hours; B and C can do it in 3 hours. A and C can do it in 2 hours. How long will B alone take to do it?                                                                                

(1)10 hours             (2)12 hours           

(3)8 hours               (4)24 hours 

3. A and B together can complete a work in 8 days and B and C together can complete the work in 6 Days. In how much time will A and C together complete the work?

(1)8 days                (2)10 days                   (3)12 days              (4)20 days

 4. A and B can do a work in 18 and 24 days respectively. They worked together for 8 days and then A left. The remaining work was finished by B in:

(1) 5 days              (2)5 1/3 days             

(3)8 days               (4)10 days

5.8 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 to be completed

 (1) 2           (2)3      (3)4                       (4)5

 6. A certain number of persons can complete a piece of work in 55 days. If there were 6 persons more, the work could be finished in 11 days less. How many persons were originally there?

(1)17           (2)24         (3)30                   (4)22

7. A and B working separately can do a piece of work in 10 days and 15 days respectively. If they work on alternate days beginning with A, in how many days will the work be completed?

 (1)18 days            (2)13 days                     (3)12 days             (4)6 days

8. A and B can do a piece of work in 28 days respectively .They began to work together but a leaves after sometime and B completed remaining work in 17 days. After how many days did A leave?

 1)14 2/5 days         (2)9 days                      (3)8 days                 (4)7 5/9 days

9. A and B can complete a work in 15 days and 10 days respectively. They started doing the work together but after 2 days, B had to leave and A alone completed the remaining work. The whole work was completed in:

 (1)10 days             (2)8 days                      (3)12 days              (4)15 days

10. A and B can separately complete a piece of work in 20 days and 30 days respectively. They worked together for some time,then B left the work. If A completed the rest of the work in 10 days , then be worked for

(1)6 days               (2)8 days                       (3)12 days              (4)16 days


Answers:

1-1          2-2          3-1          4-2          5-3          6-2          7-3

8-3          9-3          10-3

...