1 . A can lay railway track between two given stations in 16 days and B can do the same job in 12 days. With help of C, they did the job in 4 days only. Then, C alone can do the job in:
2. 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 :
3. A, B and C can do a piece of work in 20, 30 and 60 days respectively. In how many days can A do the work if he is assisted by B and C on every third day?
 15 days
 56 days
 13 days
 10 days

4. A is thrice as good as workman as B and therefore is able to finish a job in 60 days less than B. Working together, they can do it in:
5. A alone can do a piece of work in 6 days and B alone in 8 days. A and B undertook to do it for Rs. 3200. With the help of C, they completed the work in 3 days. How much is to be paid to C?
 Rs. 400
 Rs. 800
 Rs. 789
 Rs. 700
6 . X and Y can do a piece of work in 20 days and 12 days respectively. X started the work alone and then after 4 days Y joined him till the completion of the work. How long did the work last?
 10 days
 8 days
 6 days
 19 days
7. A is 30% more efficient than B. How much time will they, working together, take to complete a job which A alone could have done in 23 days?
 13 days
 6 days
 26 days
 8 days

8. Ravi and Kumar are working on an assignment. Ravi takes 6 hours to type 32 pages on a computer, while Kumar takes 5 hours to type 40 pages. How much time will they take, working together on two different computers to type an assignment of 110 pages?
 8 hours 15 min
 7 hours 45 min
 6 hours 45 min
 9 hours 45 min

9. 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:
10. A, B and C can complete a piece of work in 24, 6 and 12 days respectively. Working together, they will complete the same work in:




0 Comments