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- Question
A is 50% more efficient than B. They together start the work and 7/12th of work is left after 8 days. Find in what time B alone will complete the whole work.
Options- A. 36 days
- B. 44 days
- C. 50 days
- D. 40 days
- Correct Answer
-
ExplanationRatio of efficiency of A to B is 3 : 2
Let, In 8 days they complete = (3 + 2) × 8 = 40 units
So, total work = 40 × 12/5 units
Time taken by B alone to complete whole work = 40 × 12/5 ×2 = 48 days
- 1. A alone can do a work in 20 days. B is 125% more efficient than A. A and B started working and worked for 4 days. If C alone completed the remaining job in 22 days. How many days C alone takes to complete the entire job?
Options- A. 30
- B. 35
- C. 40
- D. 42 Discuss
- 2. If two flood gates A and B function simultaneously, the reservoir will be filled iu 6 hours. Gate A fills the reservoir 5 hours faster than gate B. How many hours does the faster flood gate take to fill the reservoir?
Options- A. 7 hrs
- B. 13 hrs
- C. 5 hrs
- D. 10 hrs Discuss
- 3. X can complete a task in 8 days, whereas Y can complete the same task in 10 days. If they work together, in how many days will the task be completed?
Options- A. 40/9
- B. 9/40
- C. 44/9
- D. 9/44 Discuss
- 4. Rohan and Mohit together can build a wall in 8 days. Mohit and Vikas build the same wall in 10 days and Vikas and Rohan can build the same wall in 12days. In how many days can all the three complete the same wall while working together?
Options- A. 240/37
- B. 120/37
- C. 150/37
- D. 180/37 Discuss
- 5. Painter A can paint a house in 40 days and Painter B can do it in 60 days. With help of C, they did the job in 20 days only. Then, C alone can do the job in
Options- A. 120 days
- B. 100 days
- C. 90 days
- D. 80 days Discuss
- 6. Type 1 workers can do three times the work of Type 2 workers. Twelve Type 1 workers can complete a task in 10 days. How many days would it have taken 4 Type 1 and 8 Type 2 workers to complete the same task?
Options- A. 16
- B. 17
- C. 20
- D. 18 Discuss
- 7. A can do a work in 24 days. B is 20% more efficient than A. If C can do the work in 10 more days than B, find the time taken by A and C together to complete the work.
Options- A. 43/3 days
- B. 40/3 days
- C. 50/3 days
- D. 41/2 days Discuss
- 8. Prabhat has done 1/2 of a job in 12 days. Santosh completes the rest of the job in 6 days. In how many days can they together do the job?
Options- A. 12 days
- B. 4 days
- C. 8 days
- D. 16 days Discuss
- 9. A takes 24 day in completing a work alone. Time taken by A in completing 1/3rd of the work is equal to the time taken by B in completing half of the work. How many days will be taken in completing the work if both A & B start working together?
Options- A. 21/3 days
- B. 48 days
- C. 40 days
- D. 48/5 days Discuss
- 10. 48 people could complete a task in 17 days. After 6 days, 4 of the workers left. How many days from then will it take to complete the task?
Options- A. 12
- B. 13
- C. 15
- D. 16 Discuss
Time and Work problems
Search Results
Correct Answer: 40
Explanation:
Time required will be in ratio = 5:4
B alone will do it in =16 days
Correct Answer: 10 hrs
Correct Answer: 40/9
Correct Answer: 240/37
Correct Answer: 120 days
Correct Answer: 18
Correct Answer: 40/3 days
Explanation:
A takes 24 days to complete a work.
B is 20% more efficient than A,
hence B will take (24*100)/120 = 20 days.
C takes (20+10) = 30 days.
Time taken by A & C in completing the work = (24*30)/(24+30) = (24*30)/54 = 40/3 days.
Correct Answer: 8 days
Correct Answer: 48/5 days
Explanation:
Ans.
Time taken by A to complete a work alone - 24 days
Time taken by A in completing 1/3 of work = 24*1/3= 8 Days
8 day = time taken by B in completing 1/2 of work
B alone can complete the work = 16 days
The required time in completing the work if both A & B start working together?
16*24 / 40 = 48/5 Days
Correct Answer: 12
Explanation:
Given, 48 people can do a work in 17 days. So total work = 48 x 17 = 816
Work done by 48 people in 6 days = 288.
The remaining work = 816 - 288 = 528
After 6 days four workers left. So number of people working is 44
Total number of days required for 44 men to complete the remaining work = 528/44 = 12
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