Time & Work - I

1. If 9 men working 6 hours a day can do a work in 88 days. Then 6 men working 8 hours a day can do it in how many days?

A. 77 days      B. 98 days   C. 99 days      D. 111 days

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

A. 8 hours      B. 10 hours  C. 12 hours    D. 24 hours

3. A can do a certain work in the same time in which B and C together can do it. If A and B together could do it in 10 days and C alone in 50 days, then B alone could do it in:

A.15 days        B.20 days  C.25 days        D.30 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:

A.20 days    B.45/2 days  C.25 days    D.30  days

5. A can do a certain work in 12 days. B is 60% more efficient than A. How many days does B alone take to do the same job?

A. 96/2 days    B. 15/2 days  C. 15 days       D. 7 days

6. 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 :

A.8 days       B.10 days  C.12 days     D.15 days

7. A and B can do a piece of work in 30 days, while B and C can do the same work in 24 days and C and A in 20 days. They all work together for 10 days when B and C leave. How many days more will A take to finish the work?

A.18 days     B.24 days   C.30 days     D.36 days

8. A is twice as good a workman as B and together they finish a piece of work in 18 days. In how many days will A alone finish the work.

A. 27      B. 47   C. 17      D. 57

9. 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) 5 (c) 6 (d) 8