SSC CGL Work and Efficiency Practice Test 2
15 SSC CGL work and efficiency questions with chapter-wise explanations and exam-style options.
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SSC CGL Work and Efficiency Practice Test 2
15 SSC CGL work and efficiency questions with chapter-wise explanations and exam-style options.
Preview all 14 questions in SSC CGL Work and Efficiency Practice Test 2 (no login required)
- Work and Efficiency
1. A can do a work in 15 days and B in 10 days. Together they can do it in:
- A. 5 days
- B. 6 days (Correct)
- C. 7 days
- D. 8 days
Explanation: Combined rate = 1/15 + 1/10 = 1/6.
- Work and Efficiency
2. If A completes 1/8 of a work in a day, A can finish it in:
- A. 6 days
- B. 7 days
- C. 8 days (Correct)
- D. 9 days
Explanation: Total time is reciprocal of one-day work.
- Work and Efficiency
3. 8 men can complete a work in 15 days. 12 men will complete it in:
- A. 8 days
- B. 9 days
- C. 10 days (Correct)
- D. 12 days
Explanation: Men x days = constant, so 8 x 15 / 12 = 10.
- Work and Efficiency
4. A pipe fills a tank in 8 hours and another in 12 hours. Together they fill it in:
- A. 4.8 hours (Correct)
- B. 5 hours
- C. 6 hours
- D. 7 hours
Explanation: Combined rate = 1/8 + 1/12 = 5/24, so time = 24/5 hours.
- Work and Efficiency
5. If A is twice as efficient as B, the ratio of time taken by A and B is:
- A. 1:2 (Correct)
- B. 2:1
- C. 1:4
- D. 4:1
Explanation: Time is inversely proportional to efficiency.
- Work and Efficiency
6. A can do a work in 12 days and B in 18 days. Working on alternate days starting with A, the work completes in:
- A. 13 days
- B. 14 days
- C. 15 days (Correct)
- D. 16 days
Explanation: In 2 days they do 3/36 + 2/36 = 5/36. In 12 days (6 cycles) 30/36 is done. Day 13 (A): 3/36 more, total 33/36. Day 14 (B): 2/36 more, total 35/36. Day 15 (A): finishes remaining 1/36. Work is done in 15 days.
- Work and Efficiency
7. A, B, and C can complete a work in 12, 15, and 20 days respectively. Together they finish it in:
- A. 4 days
- B. 5 days (Correct)
- C. 6 days
- D. 7 days
Explanation: 1/12 + 1/15 + 1/20 = 1/5.
- Work and Efficiency
8. A pipe fills a tank in 6 hours and a waste pipe empties it in 9 hours. If both are open, the tank fills in:
- A. 12 hours
- B. 15 hours
- C. 18 hours (Correct)
- D. 20 hours
Explanation: Net rate = 1/6 - 1/9 = 1/18.
- Work and Efficiency
9. If A is thrice as efficient as B, and B takes 24 days, A takes:
- A. 6 days
- B. 8 days (Correct)
- C. 10 days
- D. 12 days
Explanation: A takes one-third the time of B.
- Work and Efficiency
10. A can do a work in 20 days. After 5 days, B joins and the work finishes in 5 more days. B alone can do the work in:
- A. 10 days (Correct)
- B. 12 days
- C. 15 days
- D. 20 days
Explanation: A does 1/4 in 5 days. Remaining 3/4 is done in 5 days, so A+B = 3/20. Therefore B = 1/10.
- Work and Efficiency
11. 10 men can complete a work in 18 days. 15 men can complete it in:
- A. 10 days
- B. 12 days (Correct)
- C. 14 days
- D. 16 days
Explanation: 10 x 18 / 15 = 12.
- Work and Efficiency
12. A tap fills a bucket in 4 minutes. In 1 minute it fills:
- A. 1/2
- B. 1/3
- C. 1/4 (Correct)
- D. 1/5
Explanation: One-minute work is reciprocal of total time.
- Work and Efficiency
13. If A does 60% more work than B in the same time, efficiency ratio A:B is:
- A. 3:2
- B. 4:3
- C. 5:4
- D. 8:5 (Correct)
Explanation: 60% more means 160:100 = 8:5.
- Work and Efficiency
14. A and B together can do a work in 8 days. If A alone takes 24 days, B alone takes:
- A. 10 days
- B. 12 days (Correct)
- C. 16 days
- D. 20 days
Explanation: 1/B = 1/8 - 1/24 = 1/12.