WORK AND TIME PRACTICE QUESTIONS

A, B and C can do the certain piece of work in 4 days. A alone can do it in 12 days, B alone can do it in 10 days. In how many days C alone can complete the work?

A

25 days

B

18 days

C

20 days

D

15 days

Question 2

10 men can complete a piece of work in 7 days working 9 hours per days. How many men can complete the same work in 14 days working 5 hours per day?

A

12

B

10

C

9

D

7

Question 3

A pipe can fill the tank in 10 hours another pipe B can empty the same tank in 15 hours. If both the pipes are opened together, then in how many hours tank will be completely filled?

A

12 hours

B

25 hours

C

30 hours

D

18 hours

Question 4

A can complete a piece of work in 20 days. B and C can complete it in 

A

30 days

B

25 days

C

10 days

D

15 days

Question 5

A can do 

A

5 days

B

6 days

C

4 days

D

8 days

Question 6

15 persons can do work in 8 days. How many persons were required to complete one – third of the work in half the days?

A

12

B

10

C

15

D

30

Question 7

A, B and C alone can complete a piece of work in 12, 15 and 18 days respectively. If all of them started the work together, then in how many days total work will be  completed?

A



B



C



D

Question 8

Ratio of efficiencies of A, B and C is 4 : 5 : 6. If the B can complete the work in 18 days, then in how many A and C together can complete the work?

A

42.5 days

B

10 days

C

37.5 days

D

15 days

Question 9

1 man, 1 woman and 1 boy can finish the job in 30, 40 and 50 days respectively. How many men were required with 6 boys and 8 women to complete the work in 2 days?

A

2

B

4

C

3

D

5

Question 10

15 men and 18 women can complete the work in 5 days. 2 men can complete the same work in 60 days. In how many days 5 women can complete the work?

A

60

B

120

C

54

D

48