SSC CGL Work and Efficiency Practice Test 6
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 6
15 SSC CGL work and efficiency questions with chapter-wise explanations and exam-style options.
Preview all 15 questions in SSC CGL Work and Efficiency Practice Test 6 (no login required)
- Work and Efficiency
1. A can complete a work in 15 days. One-day work of A is:
- A. 1/10
- B. 1/12
- C. 1/15 (Correct)
- D. 1/18
Explanation: One-day work is reciprocal of total days.
- Work and Efficiency
2. A can do a work in 12 days and B in 18 days. Together they finish it in:
- A. 6 days
- B. 7.2 days (Correct)
- C. 8 days
- D. 9 days
Explanation: Combined rate = 1/12 + 1/18 = 5/36.
- Work and Efficiency
3. If A is three times as efficient as B and B takes 24 days, A will take:
- A. 6 days
- B. 8 days (Correct)
- C. 10 days
- D. 12 days
Explanation: More efficiency means proportionately less time.
- Work and Efficiency
4. A and B share Rs. 420 in the ratio 3:4. A gets:
- A. Rs. 160
- B. Rs. 180 (Correct)
- C. Rs. 200
- D. Rs. 220
Explanation: A gets 3/7 of the total.
- Work and Efficiency
5. A pipe fills a tank in 10 hours. In 1 hour it fills:
- A. 1/8
- B. 1/9
- C. 1/10 (Correct)
- D. 1/12
Explanation: One-hour rate is reciprocal.
- Work and Efficiency
6. One pipe fills a tank in 5 hours and another empties it in 20 hours. Together they fill it in:
- A. 5 hours
- B. 6 hours
- C. 6.67 hours (Correct)
- D. 7 hours
Explanation: Net rate = 1/5 - 1/20 = 3/20, so time = 20/3.
- Work and Efficiency
7. A can do a work in 4 days and B in 12 days. Working alternately starting with A, the work finishes in:
- A. 5 days
- B. 6 days (Correct)
- C. 6.5 days
- D. 7 days
Explanation: In 2 days they complete 1/4 + 1/12 = 1/3. After 3 cycles (6 days), 3 × 1/3 = 1, so the work is done exactly in 6 days.
- Work and Efficiency
8. B can finish a task in 25 days. In 5 days B completes:
- A. 1/3
- B. 1/4
- C. 1/5 (Correct)
- D. 1/6
Explanation: 5/25 = 1/5.
- Work and Efficiency
9. If 6 men complete a work in 20 days, 10 men will complete it in:
- A. 10 days
- B. 12 days (Correct)
- C. 14 days
- D. 16 days
Explanation: Men x days is constant.
- Work and Efficiency
10. If A:B = 5:4 in efficiency and A takes 16 days, B will take:
- A. 18 days
- B. 20 days (Correct)
- C. 22 days
- D. 24 days
Explanation: Time ratio is inverse of efficiency ratio.
- Work and Efficiency
11. A and B together complete a work in 10 days, while B alone does it in 15 days. A alone will take:
- A. 20 days
- B. 25 days
- C. 30 days (Correct)
- D. 35 days
Explanation: A's rate = 1/10 - 1/15 = 1/30.
- Work and Efficiency
12. A pipe fills 1/4 of a tank in 2 hours. It will fill the whole tank in:
- A. 6 hours
- B. 7 hours
- C. 8 hours (Correct)
- D. 9 hours
Explanation: If one-fourth takes 2 hours, full tank takes 8 hours.
- Work and Efficiency
13. If A works 5 days and B works 3 days on the same daily rate, wage ratio is:
- A. 3:5
- B. 5:3 (Correct)
- C. 2:3
- D. 3:2
Explanation: Wages are proportional to days worked.
- Work and Efficiency
14. If efficiency rises by 20%, time falls by:
- A. 15%
- B. 16.67% (Correct)
- C. 18%
- D. 20%
Explanation: New time = 1/1.2 of old time.
- Work and Efficiency
15. If 7 workers do a job in 9 days, total work is:
- A. 56 worker-days
- B. 63 worker-days (Correct)
- C. 72 worker-days
- D. 81 worker-days
Explanation: Workers x days.