SSC CGL Time and Work Verified Practice Test 5
15 structurally validated Time and Work questions with unique options, mapped answers and explanations.
SSC CGL Time and Work Verified Practice Test 5
15 structurally validated Time and Work questions with unique options, mapped answers and explanations.
Preview all 15 questions in SSC CGL Time and Work Verified Practice Test 5 (no login required)
- Efficiency
1. If A completes 1/20 of a work in one day, A alone will take:
- A. 10 days
- B. 15 days
- C. 20 days (Correct)
- D. 25 days
Explanation: Total time is the reciprocal of one-day work.
- Man-days
2. 16 workers complete a job in 15 days. 20 workers will complete it in:
- A. 10 days
- B. 12 days (Correct)
- C. 14 days
- D. 16 days
Explanation: Workers x days remains constant, so 16 x 15 / 20 = 12.
- Pipes
3. Two taps can fill a tank in 8 hours and 24 hours. Working together, they will fill it in:
- A. 5 hours
- B. 6 hours (Correct)
- C. 7 hours
- D. 8 hours
Explanation: Combined rate = 1/8 + 1/24 = 1/6.
- Efficiency Ratio
4. If A is twice as efficient as B, the efficiency ratio A:B is:
- A. 1:2
- B. 2:1 (Correct)
- C. 2:3
- D. 3:2
Explanation: Twice as efficient means the ratio is 2:1.
- Alternate Days
5. A can finish a work in 8 days and B in 12 days. Working on alternate days starting with A, how much work is completed in the first 2 days?
- A. 1/6
- B. 5/24 (Correct)
- C. 1/3
- D. 7/24
Explanation: In one cycle, A does 1/8 and B does 1/12, so total = 5/24.
- Work Sharing
6. A, B, and C can finish a work in 15, 20, and 30 days. Together they finish it in:
- A. 5 days
- B. 6 days (Correct)
- C. 7 days
- D. 8 days
Explanation: Combined rate = 1/15 + 1/20 + 1/30 = 1/6.
- Pipes and Waste
7. A pipe fills a tank in 4 hours and a waste pipe empties it in 12 hours. If both are opened, the tank fills in:
- A. 4 hours
- B. 5 hours
- C. 6 hours (Correct)
- D. 8 hours
Explanation: Net rate = 1/4 - 1/12 = 1/6.
- Efficiency
8. If B takes 30 days and A is 50% more efficient than B, A takes:
- A. 18 days
- B. 20 days (Correct)
- C. 22 days
- D. 24 days
Explanation: A's efficiency is 3:2, so time ratio is 2:3. A takes 20 days.
- Part Work
9. A can do a work in 30 days. After 10 days, B joins and they complete the rest in 10 more days. B alone can do the work in:
- A. 15 days
- B. 20 days
- C. 25 days
- D. 30 days (Correct)
Explanation: A does 1/3 in 10 days. Remaining 2/3 is done in 10 days, so A+B = 1/15. Since A = 1/30, B = 1/30.
- Group Work
10. 18 labourers finish a work in 10 days. 12 labourers will finish it in:
- A. 12 days
- B. 14 days
- C. 15 days (Correct)
- D. 18 days
Explanation: 18 x 10 / 12 = 15.
- Pipes
11. A tap fills 1/5 of a tank in one hour. It will fill the tank in:
- A. 4 hours
- B. 5 hours (Correct)
- C. 6 hours
- D. 10 hours
Explanation: Reciprocal of one-hour work gives total time.
- Combined Work
12. A and B together complete a work in 4 days. If A alone takes 12 days, B alone takes:
- A. 4 days
- B. 5 days
- C. 6 days (Correct)
- D. 7 days
Explanation: 1/B = 1/4 - 1/12 = 1/6.
- Women and Men
13. 10 men can finish a work in the same time as 15 women. Efficiency ratio of one man to one woman is:
- A. 2:3
- B. 3:2 (Correct)
- C. 4:3
- D. 5:3
Explanation: If 10 men = 15 women, then one man = 15/10 women = 3/2 women.
- Efficiency
14. If A does 20% more work than B in the same time, A:B efficiency ratio is:
- A. 5:4
- B. 6:5 (Correct)
- C. 4:3
- D. 3:2
Explanation: 120:100 simplifies to 6:5.
- Basic Work
15. A can complete a work in 12 days. What part of the work does A complete in 1 day?
- A. 1/10
- B. 1/12 (Correct)
- C. 1/14
- D. 1/15
Explanation: One-day work is the reciprocal of total days.