SSC CHSL 202131)24 persons can do a piece of work in 20 days. In how many days can 30 persons do the same work?

Correct Option: B

16

SSC CHSL 202132)A can complete a piece of work in 7 days and B can complete the same work in 12 days. A and B worked together for 3 days. C alone completed the remaining work in 9 days will C take to complete the same work entirely?

Correct Option: C

28

SSC CHSL 202133)X and Y together can do a work in \(2 \frac{2}{5}\) days, Y and Z together can do the same work in 3 days, and X and Z together can do the same work in 4 days. The time taken by X, Y and Z together to do the same work is:

Correct Option: C

2 days

SSC CHSL 202134)P can complete five-eighths of a work in 15 days and Q can complete three-fourths of the same work in 30 days. They worked together for 8 days and then P left. How much time will Q working alone, take to complete the remaining work?

Correct Option: C

18 days 16 hours

P alone can complete work in = 15 × 8/5 = 24 days

Q alone can complete work in = 30 × 4/3 = 40 days

Let work done alone by Q to complete work be x, then 8/24 + (8+x)/40 = 1

x = 56/3 days which is equal to 18 days and 16 hours

SSC CHSL 202135)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:

Correct Option: A

60

SSC CHSL 202136)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?

Correct Option: B

5 hours 20 minutes

SSC CHSL 202137)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?

Correct Option: A

2

SSC CHSL 202138)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:

Correct Option: C

18

SSC CHSL 202139)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?

Correct Option: C

7

SSC CHSL 202140)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?

Correct Option: B

9

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