81). A man can finish a piece of work in 5 days. The balance work after 3 days will be
| A). \( \Large \frac{1}{5} \) |
| B). \( \Large \frac{2}{5} \) |
| C). \( \Large \frac{3}{5} \) |
| D). \( \Large \frac{4}{5} \) |
|
82). A can do a piece of work in 5 days and B can do the same work in 7 days. If both work together, they will finish the work in
| A). 12 days |
| B). 2 days |
| C). \( \Large 2\frac{11}{12} \) |
| D). \( \Large \frac{12}{35} \) |
|
83). A can do a piece of work in 10 days and B can do in 12 days and C do the same work in 15 days. In how many days, they can finish the work, working together?
| A). 8 days |
| B). 15 days |
| C). 4 days |
| D). 11 days |
|
84). A and B can do a piece of work in 18 days, B and C can do in 24 days, A and C in 36 days. The time taken by them to do this work together is
| A). 16 days |
| B). 15 days |
| C). 12 days |
| D). 8 days |
|
85). A can do a job in 24 days, B in 9 days and C in 12 days, B and C together start the work but leave after 3 days. The time taken by A to complete the remaining work is
| A). 8 days |
| B). 12 days |
| C). \( \Large 8\frac{1}{2} \) |
| D). 10 days |
|
86). A and B can finish a work in 72 days, B and C can finish in 120 days and A and C can do it in 90 days. In what time can A alone do it?
| A). 150 days |
| B). 120 days |
| C). 100 days |
| D). 80 days |
|
87). If 10 men or 18 boys can do a piece of work in 15 days, then 25 men and 15 boys together will do twice the work in
| A). \( \Large \frac{9}{2} \) days |
| B). 9 days |
| C). 18 days |
| D). 63 days |
|
88). A can do a piece of work in 15 days and B in 10 days. B alone works at it for 5 days and then leaves. A alone can finish the remaining work in
| A). \( \Large 7\frac{1}{2} \) days |
| B). 8 days |
| C). \( \Large 6\frac{1}{2} \) days |
| D). 9 days |
|
89). A can do a piece of work in 30 hrs. If he takes his son with him and both work together then the work is finished in 20 hrs. The son working with the same capacity as when he was working with his father, can finish the work in
| A). 60 hrs |
| B). 50 hrs |
| C). 25 hrs |
| D). 10 hrs |
|
90). 8 men or 12 boys can do a piece of work in 25 days. In how many days can the work be done by 6 men and 11 boys?
| A). 12 days |
| B). 15 days |
| C). 16 days |
| D). 18 days |
|
