Exercise :: Time and Work - General Questions
26. | A and B can do a work in 8 days, B and C can do the same work in 12 days. A, B and C together can finish it in 6 days. A and C together will do it in : | |||||||||||||||||||||||||||||||||||||||||||||||||
Answer: Option C Explanation:
So, A and C together will do the work in 8 days. |
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27. | A can finish a work in 24 days, B in 9 days and C in 12 days. B and C start the work but are forced to leave after 3 days. The remaining work was done by A in: | |||||||||||||||||||||||||||||||||||||||||||||||||||||
Answer: Option C Explanation:
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28. | X can do a piece of work in 40 days. He works at it for 8 days and then Y finished it in 16 days. How long will they together take to complete the work? | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Answer: Option A Explanation:
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Exercise :: Time and Work - General Questions
6. | If 6 men and 8 boys can do a piece of work in 10 days while 26 men and 48 boys can do the same in 2 days, the time taken by 15 men and 20 boys in doing the same type of work will be: | |||||||||||||||||||||||||||||||||
Answer: Option A Explanation:
Let 1 man's 1 day's work = x and 1 boy's 1 day's work = y.
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7. | A can do a piece of work in 4 hours; B and C together can do it in 3 hours, while A and C together can do it in 2 hours. How long will B alone take to do it? | |||||||||||||||||||||||||||||||||||||||||||
Answer: Option C Explanation:
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8. | A can do a certain work in the same time in which B and C together can do it. If A and B together could do it in 10 days and C alone in 50 days, then B alone could do it in: | |||||||||||||||||||||||||||||||||||||||||||||||
Answer: Option C Explanation:
A's 1 day's work = (B + C)'s 1 day's work .... (ii)
So, B alone could do the work in 25 days. |
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Exercise :: Time and Work - General Questions
11. | A can finish a work in 18 days and B can do the same work in 15 days. B worked for 10 days and left the job. In how many days, A alone can finish the remaining work? | |||||||||||||||||||||||||||||||||
Answer: Option C Explanation:
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12. | 4 men and 6 women can complete a work in 8 days, while 3 men and 7 women can complete it in 10 days. In how many days will 10 women complete it? | ||||||||||||||||||||||||||
Answer: Option B Explanation:
Let 1 man's 1 day's work = x and 1 woman's 1 day's work = y.
Hence, 10 women will complete the work in 40 days. |
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Exercise :: Time and Work - General Questions
16. | X and Y can do a piece of work in 20 days and 12 days respectively. X started the work alone and then after 4 days Y joined him till the completion of the work. How long did the work last? | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Answer: Option B Explanation:
Hence, total time taken = (6 + 4) days = 10 days. |
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17. | A is 30% more efficient than B. How much time will they, working together, take to complete a job which A alone could have done in 23 days? | |||||||||||||||||||||||||||||||||||||||
Answer: Option B Explanation:
Ratio of times taken by A and B = 100 : 130 = 10 : 13. Suppose B takes x days to do the work.
Therefore, A and B together can complete the work in 13 days. |
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18. | Ravi and Kumar are working on an assignment. Ravi takes 6 hours to type 32 pages on a computer, while Kumar takes 5 hours to type 40 pages. How much time will they take, working together on two different computers to type an assignment of 110 pages? | |||||||||||||||||||||||||||||||||||||||
Answer: Option C Explanation:
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Exercise :: Time and Work - General Questions
21. | A takes twice as much time as B or thrice as much time as C to finish a piece of work. Working together, they can finish the work in 2 days. B can do the work alone in: | ||||||||||||||||||||||||||||||||||
Answer: Option B Explanation:
So, B takes (12/2) = 6 days to finish the work. |
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22. | A and B can complete a work in 15 days and 10 days respectively. They started doing the work together but after 2 days B had to leave and A alone completed the remaining work. The whole work was completed in : | |||||||||||||||||||||||||||||||||||||||||||||||||||||
Answer: Option C Explanation:
Hence, the total time taken = (10 + 2) = 12 days. |
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23. | A and B can do a piece of work in 30 days, while B and C can do the same work in 24 days and C and A in 20 days. They all work together for 10 days when B and C leave. How many days more will A take to finish the work? | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Answer: Option A Explanation:
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