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A man can do a job in 15 days. His fathe...

A man can do a job in 15 days. His father takes 20 days and his son finishes it in 25 days. How long will they take to complete the job if they all work together?

A

`5 (15)/(47) ` days

B

`5 (17)/(23)` days

C

`6 (18)/(47)` days

D

`6 (12)/(47)` days

Text Solution

Verified by Experts

The correct Answer is:
C
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MAHENDRA-TIME AND WORK -EXERCISES
  1. If man A complete a work in 10 days & man B complete the same work in ...

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  2. A B and C can complete a piece of work in 24, 6 and 12 days respective...

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  3. A man can do a job in 15 days. His father takes 20 days and his son fi...

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  4. A man can do a piece of work in 5 days, but with the help of his son h...

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  5. A can lay railway track between two given stations in 16 days and B ca...

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  6. A takes twice as much time as B and thrice as much time as C finish a ...

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  7. Mohan and Sohan are working on a assignment. Mohan takes 6 hours to ty...

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  8. Two workers A and B are engaged to do a piece of work. A working alone...

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  9. P can complete a work in 12 days working 8 hours a day. Q can complete...

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  10. A and B can do a work in 12 days, B and C in 15 days, C and A in 20 da...

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  11. A and B can do a piece of work in 72 days, B and C can do it in 120 da...

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  12. A and B can do a piece of work in 5 days, B and C can do it in 7 days ...

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  13. A can do a piece of work in 4 hours: B and C can do it in 3 hours. A a...

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  14. A can do a certain work in the same time in which B and C together can...

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  15. A Works twice as fast as B. If B can complete a work in 12 days indepe...

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  16. A is 30% more efficient than B. How much time will they, working toget...

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  17. A does half as much work as B in three-fourth of the time. If together...

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  18. A can finish a work in 18 days and B can do the same work in 15 days. ...

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  19. Ram and Mohan can complete a work in 15 days and 10 days respectively....

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  20. A can finish a work in 24 days, B in 9 days and C in 12 days. B and C ...

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