71)

Pipe A can fill a tank in 12 minutes and pipe B can empty it in 6 minutes. If the tank is 50% full, and both pipes are opened together, then the tank will be completely empty after:

SSC Selection Post Matric 2022

A)

7 minutes

B)

6 minutes

C)

7.2 minutes

D)

6.4 minutes

72)

A, B and C can complete a certain work in 30 days. B and C together can complete the same work in 45 days. If B is 20% more efficient than A, then B alone can complete one-third of the same work in:

SSC Selection Post Matric 2022

A)

20 days

B)

30 days

C)

15 days

D)

25 days

73)

A and B together can do a certain work in 36 days, whereas B and C together can do it in 30 days. A, B and C together can complete the same work in 24 days. In how many days can A alone complete \(33 \frac{1}{3} \)% of the same work?

SSC Selection Post Matric 2022

A)

45

B)

36

C)

20

D)

40

74)

‘A' can complete a work in 20 days and ‘B' can do \(\frac{2}{5}\) of the same work in 16 days. They work together for 10 days. The remaining work was completed by 'C’ alone in 12 days. ‘C’ alone will complete the same work in:

SSC Selection Post Matric 2022

A)

48 days

B)

36 days

C)

24 days

D)

40 days

75)

18 men can complete a certain work in 15 days working 8 hours a day. How many men can complete the same work in 12 days working 9 hours a day?

SSC Selection Post Matric 2022

A)

15

B)

18

C)

20

D)

25

76)

A and B can do a certain work in 25 and 20 days, respectively. They work together for 4 days. The remaining work is completed by C in 8 days. C alone can complete 40% of the original work in:

SSC Selection Post Matric 2022

A)

8 days

B)

5 days

C)

6 days

D)

4 days

77)

Eight men can complete a work in 54 days. In how many days will 6 men and 12 boys complete the same work if one man works as much as 2 boys?

SSC Selection Post Matric 2022

A)

36

B)

30

C)

24

D)

40

78)

A and B can do a job in 10 days and 5 days, respectively. They worked together for two days, after which B was replaced by C and the work was finished in the next three days. How long will C alone take to finish 60% of the job?

SSC CPO 2020

A)

18 days

B)

30 days

C)

25 days

D)

24 days

79)

A is twice as good a workman as B and together they finish a piece of work in 13 days. In how many days will B alone finish the work?

SSC CPO 2020

A)

19.5

B)

39

C)

21

D)

42

80)

A and B can do a piece of work in 36 days. B and C can do the same work in 60 days. A and C can do the same work in 45 days. In how many days can A alone complete the same work?

SSC CPO 2020

A)

120

B)

90

C)

45

D)

60