31). 3 men can do a piece of work in 6 days. 5 women can do the same work in 18 days. If 4 men and 10 women work together, then how long will it take to finish the work?
| A). 3 days |
| B). 5 days |
| C). 2 days |
| D). 4 days |
|
32). 3 men can do a piece of work in 18 days. 6 children can also do that work in 18 days. 4 men and 4 children together will finish the work in how many days?
| A). 10 |
| B). 6 |
| C). 12 |
| D). 9 |
|
33). A mason can build a tank in 12 h. After working for 6 h, he took the help of a boy and finished the work in another 5 h. The time that the boy will take alone to complete the work is
| A). 30 h |
| B). 45 h |
| C). 60 h |
| D). 64 h |
|
34). A and B can do a job together in 12 days. A is 2 times as efficient as B. In how many days can B alone complete the work ?
| A). 36 |
| B). 12 |
| C). 18 |
| D). 9 |
|
35). A does 20% less work than B. If A can complete a piece of work in \(7\frac{1}{2}\)h, then B can do it in
| A). 4 h |
| B). 6 h |
| C). 8 h |
| D). 10 h |
|
36). A takes twice as much time as B and C takes thrice as much time as B to finish a work. Working together, they can finish the work , in 12 days. Find the number of days needed for A to do the work alone.
| A). 20 |
| B). 22 |
| C). 33 |
| D). 44 |
|
37). A is thrice as good a workman as B and therefore is able to finish a job in 30 days less than B. How many days will they take to finish the job working together?
| A). \( \Large 10\frac{1}{4} \) |
| B). \( \Large 11\frac{3}{4} \) |
| C). \( \Large 11\frac{1}{4} \) |
| D). \( \Large 11 \frac{1}{3} \) |
|
38). X can do a work in 16 days. In how many days will the work be completed by Y, if the efficiency of Y is 60% more than that of X?
| A). 10 days |
| B). 12 days |
| C). 25 days |
| D). 30 days |
|
39). 10 men and 8 women together can complete a work in 5 days. Work done by one woman in a day is equal to half the work done by a man in 1 day. How many days will it take for 4 men and 6 women to complete that work?
| A). 12 days |
| B). 10 days |
| C). \( \Large \frac 8{2}{3} \)days |
| D). \( \Large \frac 4{3}{4} \)days |
|
40). A takes twice the time taken by B and thrice the time taken by C to do a particular piece of work. Working together, they can complete the work in 2 days. Find the number of days taken by A, B and C respectively to complete the work alone.
| A). 12, 6 and 4 |
| B). 18,9 and 6 |
| C). 24, 12 and 8 |
| D). 6, 3 and 2 |
|
