Discussion
Home ‣ Aptitude ‣ Time and Work Comments
- Question
- Working together P and Q can do a job is 6 days. Q and R can do the same job in 10 days while P and R can do it in 5 days. How long will it take, if all of them work together to complete the job?
Options- A. 42/7 days
- B. 43/7 days
- C. 44/7 days
- D. 45/7 days
- Correct Answer
- 42/7 days
Explanation(P + Q)'S 1 day's work = 1/6
(Q + R)'s 1 day's work = 1/10
(P + R)'s 1 day's work = 1/5
On adding, 2 (P + Q + R)'s 1 day's work = 1/6 + 1/10 + 1/5 = 7/15
( P + Q + R)'s 1 day's work = 7/30
? (P + Q + R)'s can do the entire work in = 30/7 = 42/7 days - 1. A women can weave a basket in 6 days. But with the help of her daughter, she can complete the work in 4 days. In what time can the daughter alone do the work?
Options- A. 12 days
- B. 16 days
- C. 8 days
- D. 10 days Discuss
- 2. A, B and C working in a garment manufacturing company can do the same assignment in 24, 6 and 12 days, respectively. Working together the assignment will be complete in how many days?
Options- A. 33/7 days
- B. 43/7 days
- C. 4 days
- D. 3 days Discuss
- 3. A and B can do a piece of work in 8 days, B and C can do the same work in 12 days and A and C complete it in 8 days. In how many days A, B and C can complete the whole work,working together?
Options- A. 4
- B. 6
- C. 12
- D. 9 Discuss
- 4. A and B can do a piece of work in 12 days B and C in 15 days C and A in 20 days. In how many days can C alone do it?
Options- A. 60
- B. 50
- C. 25
- D. 24 Discuss
- 5. A is thrice as efficient as B. Working together they complete the work in 3 days. If B take 8 days more then A, What is the number of days taken by A to finish the while work, alone?
Options- A. 4
- B. 2
- C. 12
- D. 16 Discuss
- 6. The efficiency of Romil is twice that of Sanjay and he can finish a work in 4 h less than the time taken by Sanjay. If both of them work together they can finish the same work in?
Options- A. 8 h
- B. 3 h
- C. 8 / 3 h
- D. 4 / 3 h Discuss
- 7. A man is paid ? 5 per h for regular working day and ? 8 per h overtime. A regular working day has 8 h and a regular week has 5 working days. If he earns ? 920 in 4 weeks, then what is the total number of hours that he worked assuming that he was present on all regular working days?
Options- A. 200 h
- B. 180 h
- C. 175 h
- D. 160 h Discuss
- 8. Pipes A and B can fill a tank in 20 h and 30 h, respectively and pipe C can empty the full tank in 40 h. If all the pipes are opened together, how much time will be needed to make the tank full?
Options- A. 161/7 h
- B. 171/7 h
- C. 181/7 h
- D. 191/7 h Discuss
- 9. A man, a women and a boy can do a job in 3, 4 and 12 days , respectively. How many boys must assist one man and one women to complete the job in one and a half days?
Options- A. 12
- B. 6
- C. 3
- D. 1 Discuss
- 10. A leak in the bottom of a tank can empty the full tank in 6 h. An inlet pipe fills water at the rate of 4 L in a min. When the tank is full, the inlet is opened and due to the leak the tank is empty in 8 h. Find the capacity of the tank?
Options- A. 5000 L
- B. 5670 L
- C. 5700 L
- D. 5760 L Discuss
Time and Work problems
Search Results
Correct Answer: 12 days
Explanation:
Women's 1 day's work = 1/6
(Women + Daughter)'s 1 day's work = 1/4
? Daughter's 1 day's work = 1/4 - 1/6 = 1/12
So, the daughter can do the work in 12 days.
Correct Answer: 33/7 days
Explanation:
(A + B + C)' S 1 day's work = (1/24) + (1/6) + (1/12) = 7/24
? (A + B + C) can do the entire work in = 24/7
= 33/7 days
Correct Answer: 6
Explanation:
Efficiency of (A + B) = 12.5%
Efficiency of (B + C) = 8.33%
Efficiency of (C + A) = 12.5%
? Efficiency of [(A + B) + (B + C) + (C + A)] = 33.33%
? Efficiency of (A + B + C) = 16.66%
? No. of days Required by A, B and C together = 100/16.66 = 6 days
Correct Answer: 60
Explanation:
Efficiency of (A + B) = 8.33%
Efficiency of (B + C) = 6.66%
Efficiency of (C + A) = 5.00%
? Efficiency of A + B + C = (8.33 + 6.66 + 5) / 2 = 10%
? Efficiency of C = Efficiency of [(A + B + C) - (A + B) ]
= (10 - 8.33) = 1.66%
? No. of days required by C alone = 100/1.66 = 60days
Correct Answer: 4
Explanation:
Efficiency of A + B = 33.33% = 100/3
Ratio of efficiency of A and B = 3 : 1
? Efficiency of A = (3/4) x 33.33 = 25%
? Number of days taken by A = 100/25 = 4
Correct Answer: 8 / 3 h
Explanation:
As the efficience of Romil is twice that of Sanjay, Romil, will take x h for completeion of the work, when Sanjay is taking 2x h.
Given, 2x - x = 4
? x = 4
Hence, they take = 1/(1/4 + 1/8) = 8/3 h
Correct Answer: 175 h
Explanation:
Number of regular hours during 4 weeks = 8 x 5 x 4 = 160
Amount paid for regular working hours = 160 x 5 = ? 800
Balance left = (920 - 800) = ? 120
So, ? 120 is paid for his over time at ? 8 per h.
? Total number of overtime working hours = 120/8 = 15 h
Total working hours = (160 + 15) = 175 h
Correct Answer: 171/7 h
Explanation:
Net part filed in 1 h = (1/20 + 1/30 - 1/40) = 7/120
Hence, the tank will be full in 120/7 = 171/7 h
Correct Answer: 1
Explanation:
Portion of work completed by one man in 11/2 days.
i.e., 3/2 days = 3/(2 x 3) = 1/2
Portion of work completed by one women in 11/2 days.
i.e., 3/2 days = 3/(2 x 4) = 3/8
? Portion of work completed by boys = 1 - (1/2 + 3/8) = 1/8
Now, portion of work completed by each boy in 3/2 days = 3/(2 x 12) = 1/8
Hence, only one boys would be required.
Correct Answer: 5760 L
Explanation:
Efficiency of the leak = 1/6
Combined efficiency of leak and inlet pipe
So, efficiency of inlet pipe = 1/6 - 1/8 = (4 - 3)/24 = 1/24
Inlet pipe can fill the tank in 24 h, at rate of 4 L/min.
? Capacity = 24 x 60 x 4 = 5760 L
Comments
There are no comments.More in Aptitude:
Programming
Copyright ©CuriousTab. All rights reserved.