11)

A certain number of persons can complete a work in 54 days. If there were 15 persons less, it would take 18 days more for the work to be completed. Initially, the number persons is:

SSC CHSL 2021

A)

60

B)

72

C)

56

D)

50

12)

A person rows upstream a distance of 55 km in 5 hours and rows downstream a distance of 75 km in 3 hours. How much time will he take to row a distance of 96 km in still water?

SSC CHSL 2021

A)

4 hours 40 minutes

B)

5 hours 20 minutes

C)

5 hours 45 minutes

D)

6 hours 10 minutes

13)

A, B and C can independently complete the same task in 4, 6 and 12 days, respectively. In how many days will they be able to complete the same task if they work together?

SSC CHSL 2021

A)

2

B)

3

C)

\(2\frac{1}{4}\)

D)

\(2\frac{1}{2}\)

14)

A, B and C can complete a work in x, 30 and 45 days, respectively. B and C worked together for 6 days. The remaining work was completed by A alone in 12 days. The value of x is:

SSC CHSL 2021

A)

24

B)

20

C)

18

D)

15

15)

P and Q can complete a work in 9 days and 15 days, respectively. If they work together for three days, then in how many days will the remaining work be completed by Q alone?

SSC CHSL 2021

A)

12

B)

8

C)

7

D)

9

16)

A is thrice as efficient as B. A takes 24 days less than B to complete a work. If they work together, in how many days, will the work be completed?

SSC CHSL 2021

A)

8

B)

9

C)

12

D)

15

17)

A can complete a certain work in 30 days. He started the work. After 4 days, B joined him and the whole work was completed in 10 days from the beginning. B alone can complete one-third of the same work in:

SSC CHSL 2021

A)

6 days

B)

3 days

C)

2 days

D)

4 days

18)

A can complete a work in 20 days, while B can complete the same work in 25 days. Both worked together for 10 days and then C alone completed the remaining work in 10 days. In how many days will A, B and C together complete the same work?

SSC CHSL 2021

A)

12 days

B)

8 days

C)

5 days

D)

10 days

19)

A can do 60% of a work in 18 days, while B can do 40% of the same work in 10 days. Both work together for 10 days only. C completed the remaining work in 4 days. In how many days will C complete the same work?

SSC CHSL 2021

A)

18

B)

25

C)

15

D)

12

20)

Sachin alone can complete a piece of work for Rs. 8,500 in \(8\frac{1}{2}\) days. But with the help of Vishnu, the work is completed in 6 days. The share to be paid to Vishnu is:

SSC CHSL 2021

A)

Rs. 2,400

B)

Rs. 2,000

C)

Rs. 2,500

D)

Rs. 3,200