61). Rambabu, Santosh and Sunil can finish a piece of work in 10, 12 and 15 days respectively. If Santosh stops doing the work after 2 days, Rambabu and Sunil will finish the work in
| A). 2 days |
| B). 3 days |
| C). \( \Large 2\frac{1}{2} \) days |
| D). \( \Large 3\frac{1}{2} \) days |
|
62). Three taps A, B and C can fill a tank in 12, 15 and 20 hours respectively. If A is open all the time and B and C are opened for one hour each alternatively, and A and B initiate, then tank will an in
| A). \( \Large 7\frac{3}{4} \) hours |
| B). 8 hours |
| C). 7 hours |
| D). \( \Large 7\frac{1}{2} \) hours |
|
63). A man undertakes to do a certain work in 150 days. He employs 200 workers. He discovers that only a quarter of the work is done is 50 days. In order to complete the work on schedule, he must additionally employ
| A). 50 workers |
| B). 100 workers |
| C). 150 workers |
| D). 200 workers |
|
64). An electric pump can fill a tank in 3 hours. Because of a leak in the tank, it took \( \Large 3\frac{1}{2} \) hours to fill the tank. The leak can drain out all the water of the tank in
| A). 21 hours |
| B). 24 hours |
| C). \( \Large 10\frac{1}{2} \) hours |
| D). 12 hours |
|
65). Rajan can do a piece of work in 30 days and Mukesh in 20 days. Mukesh alone do it for 10 days and then leaves. Raj an alone can finish the remaining work in
| A). 15 days |
| B). 12 days |
| C). 14 days |
| D). 18 days |
|
66). A group of 10 students working one hour per day complete a piece of work in 12 days. If there are 12 students in the group and they work one hour per day, then will be able to complete the work in
| A). 8 days |
| B). 9 days |
| C). 10 days |
| D). 11 days |
|
67). Ram and Sunil can finish a work in 8 and 16 hours respectively. If they work at it alternatively for an hour Ram beginning first, the work will be finish in.
| A). \( \Large 8\frac{3}{4} \) hours |
| B). \( \Large 10\frac{2}{3} \) hours |
| C). \( \Large 10\frac{1}{2} \) hours |
| D). \( \Large 11\frac{2}{3} \) hours |
|
68). 12 men complete a work in 18 days. 6 days after they had started working, 4 men joined them. How many days will all of them take to complete the remaining work?
| A). 8 days |
| B). 12 days |
| C). 13 days |
| D). 9 days |
|
69). 72 men can build a wall 280 m long in 42 days. The number of persons who would take 36 days to build a similar will 100 m in length will be
| A). 15 |
| B). 30 |
| C). 25 |
| D). 20 |
|
70). Sunil can do a work in 36 days, Ram in 54 days and Balu in 72 days. They started working together but before the work was to be over, Sunil left 8 days before and 12 days before Ram. Balu will complete the work alone in
| A). 20 days |
| B). 24 days |
| C). 30 days |
| D). 34 days |
|
