21)

Geeta can assemble a toy in 10 minutes, whereas Sudha can assemble the same toy in 15 minutes. If they work together, how much time will they take to assemble 60 toys?

, Avg: 00:36 , 92%✓ SSC CHSL 2021

A)

7 hours 30 minutes

B)

7 hours

C)

5 hours

D)

6 hours

22)

A can do a piece of work in 12 days. He worked for 6 days and left, and then B finished it in 10 days. If both work together, then in how many days will they finish the same work?

, Avg: 00:48 , 100%✓ SSC CHSL 2021

A)

7

B)

9

C)

9.5

D)

7.5

23)

Suman and Lata working together can complete a task in 8 days. If Lata can complete the same task in 12 days, then how many days will Suman take to complete the same task?

, Avg: 00:40 , 100%✓ SSC CHSL 2021

A)

15

B)

24

C)

10

D)

18

24)

40 persons take 6 days to complete a certain task, working 10 hours a day. How many hours a day will be sufficient for 30 persons to complete the same task in 10 days?

, Avg: 00:30 , 100%✓ SSC CHSL 2021

A)

8

B)

10

C)

9

D)

6

25)

A can complete a task in 6 days, while B can complete the same task in 12 days. How many days will they take to complete the same task if they work together?

, Avg: 00:12 , 100%✓ SSC CHSL 2021

A)

3

B)

5

C)

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

D)

4

26)

A can complete one-sixth of a work in 5 days and B can complete one-fourth of the same work in 15 days. In how many days, will both working together complete the work?

, Avg: 00:34 , 100%✓ SSC CHSL 2021

A)

25 days

B)

20 days

C)

10 days

D)

12 days

27)

10 men or 15 women can complete a work in 30 days. In how many days can 15 men and 27 women complete the work?

, Avg: 01:48 , 66%✓ SSC CHSL 2021

A)

\(9\frac{1}{11}\)

B)

\(6\frac{1}{11}\)

C)

\(5\frac{1}{11}\)

D)

\(11\frac{1}{11}\)

28)

15 persons working 6 hours per day earn Rs. 900. How much money will 20 persons earn, working 10 hours per day?

, Avg: 00:39 , 100%✓ SSC CHSL 2021

A)

Rs. 1,800

B)

Rs. 1,500

C)

Rs. 2,100

D)

Rs. 2,000

29)

Working together A, B and C can complete a piece of work in 3 days. A completes the same work in 24 days and B completes it in 6 days. How many days will C alone take to complete the same work?

, Avg: 00:38 , 87%✓ SSC CHSL 2021

A)

18

B)

12

C)

6

D)

8

30)

X can complete half of the work in 20 days and Y can do one-fifth of the same work in 10 days. X started the work and left after 8 days. Then Y took over to complete the remaining work. The total number of days taken by them to complete the work is:

, Avg: 01:43 , 33%✓ SSC CHSL 2021

A)

50 days

B)

40 days

C)

48 days

D)

60 days