# Time & Work

## Trending Questions

**Q.**Two men undertake to do a piece of work for Rs. 600. One alone could do it in 6 days and the other in 8 days. With the assistance of a boy they finish it in 3 days. Boy's share should be

- Rs 300
- Rs 225
- Rs 75
- Rs 100

**Q.**4 men or 6 women can finish a piece of work in 20 days. In how many days can 6 men and 11 women finish the same work?

- 9 days
- 6 days
- 7 days
- None of these

**Q.**following observations were taken during a reciprocal levelling .

If reduced level P is 140 .815 m,

then the reduced level of Q is

Instrument near | P | Q |

Staff reading at P(in m) | 1.824 | 0.928 |

Staff reading at Q (in m) | 2.748 | 1.606 |

- 140.014 m
- 139.616 m
- 141.616 m
- 138.014 m

**Q.**5 men and 2 boys working together can do four times as much work per hour as a man and a boy together. The work done by a man and a boy should be in the ratio

- 1 : 2
- 2 : 1
- 1 : 3
- 4 : 1

**Q.**5 skilled workers can build a wall in 20 days;

8 semiskilled workers can build a wall in 25 days;10 unskilled workers can build a wall in 30 days. If a team has 2 skilled, 6 semiskilled and 5 unskilled workers, how long will it take to build the wall ?

- 20 days
- 18 days
- 16 days
- 15 days

**Q.**Seven machines take 7 minutes to make 7 identical toys. At the same rate, how many minutes would it take for 100 machines to make 100 toys?

1

7

100

100

**Q.**A bronze, spur pinion rotating at 500 rpm drives a cast iron spur gear at a transmission ratio of 4 : 1. The allowable static stresses for bronze pinion and cast iron gear are 85 MPa and 103 MPa respectively. The pinion has 16 standard 20∘ full depth invloved teeth of module 8 mm. The face width of both the gear is 90 mm. What is the power that can be transmitted from gear? Take velocity factor CV=33+V (where V is speed in m/s)

- 62.47 kW
- 29.52 kW
- 146.312 kW
- 53.93 kW

**Q.**A can do a piece of work in 30 days, B in 50 days and C in 40 days. If A is assisted by B on one day and by C on the next day alternately work will be completed in

- 173235days
- 1923days
- 163137days
- 1813days

**Q.**A does half as much work as B in three- fourths of the time. If together they take 18 days to complete a work, how much time shall B take to do it?

- 30 days
- 35 days
- 40 days
- 66 days

**Q.**Working 7 hours daily 24 men can complete a piece of work in 27 days. In how many days would 14 men complete the same piece of work working 9 hours daily?

- 36 days
- 30 days
- 32 days
- None of these

**Q.**10 men can complete a piece of work 12 days and 15 women can complete the same days. If all the 10 Men and 15 women works in how many will the work get completed.

- 623days
- 813days
- 723days
- None of these

**Q.**Five Men can paint a building in 20 days, 8 Women can paint the same building in 25 days and 10 Boys can paint it in 30 days. If a team has 2 Men, 6 Women and 5 Boys, how long will it take to paint the building?

12 days

13 days

14 days

15 days

**Q.**It would take 4 hours to complete a production order by one machine and another machine take 2 hours to complete the same order. If both machines work simultaneously at their respective constant rates, then the time taken to complete the same order is _____ hours.

7/3

3/4

2/3

4/3

**Q.**A and B can do a piece of work in 45 and 40 days, respectively. They began the work together, but A leaves after some days and B finished the remaining work in 23 days. After how many days, did A leaves?

- 6 days
- 8 days
- 9 days
- 12 days

**Q.**P, Q, R and S are working on a project. Q can finish the task in 25 days, working along for 12 hours a day. R can finish the task in 50 days, working alone for 12 hours per day. Q worked 12 hours a day but took sick leave in the beginning for two days, R worked 18 hours a day on all days. What is the ratio of work done by Q and R after 7 days from the start of the project?

10 : 11

11 : 10

20 : 21

21 : 20

**Q.**A contract is to be completed in 52 days and 125 identical robots were employed, each operational for 7 hours a day. After 39 days, five-seventh of the work was completed. How many additional robots would be required to complete the work on time, if each robot is now operational for 8 hours a day?

7

8

14

15

**Q.**A machine operator needs a gauge for checking the diameter of shaft being machined to diameter 20+0.06−0.04mm.

If wear allowance and gauge tolerance are equal to 10% of work tolerance,

the limit size of NOGO ring gauge with unilateral tolerance is

- 20−0.04−0.05mm
- 20+0.06+0.05mm
- 20+0.07+0.06mm
- 20−0.03−0.04mm

**Q.**It takes two hours for a person X to mow the lawn. Y can mow the same lawn in four hours. How long (in minutes) will it takes X and Y, if they work together to mow the lawn?

90

60

80

120

**Q.**The coding efficiency of a (7, 4) Hamming code is

- 36.36%
- 42.86%
- 75%
- 57.14%

**Q.**

The number of books in a class library is $\text{17}$more than $\text{3}$ times the number of students in the class. If there are total $\text{80}$ books, then find the total number of students.

**Q.**A stream has flow of 25 cumec and BOD concentration of 15 mg/L receives the industrial wastewater having flow of 1.5 cumecs and BOD concentration of 245 mg/L. What is the BOD concentration (mg/L) of stream at downstream point of meeting of stream with industrial waste?

- 11.45
- 28.01
- 2.51
- 16

**Q.**A is thrice as good as B and it therefore finish a piece of work in 60 days less than the time in which they can do it, working

- 2234days
- 2212days
- 24 days
- None of these

**Q.**S, M, E and F are working in shifts in a team to finish a project. M works with twice the efficiency of others but for half as many days as E worked. S and M have 6 hour shifts in a day, whereas E and F have 12 hours shifts. What is the ratio of contribution of M to contribution of E in the project?

1 : 1

1 : 2

1 : 4

2 : 1

**Q.**It was estimated that 52 men can complete a strip in a newly constructed highway connecting cities P and Q in 10 days. Due to an emergency, 12 men were sent to another project. How many number of days, more than the original estimate, will be required to complete the strip?

3 days

5 days

10 days

13 days

**Q.**A group of workers estimate to finish a work in 10 days, but 5 workers could not join the work. If the rest of them finished the work in 12 days, then the number of workers present in the team originally is

50

45

35

30

**Q.**X bullocks and Y tractors take 8 days to plough a field. If we halve the number of bullocks and double the number of tractors, it takes 5 days to plough the same field. How many days will it take X bullocks alone to plough the field?

30

35

40

45

**Q.**

A machine on an average manufactures $2585$ screws a day. Find the total number of screws produced in $28$ days.