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A tank fills two taps A and B in 10 hour...

A tank fills two taps A and B in 10 hours and 12 hours respectively, while the tap C empties it in 20 hours. If all three tubes are opened simultaneously In how long will the tank be filled?

A

7 hrs 15 min

B

7 hrs 30 min

C

7 hrs 45 min

D

8 hrs

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The correct Answer is:
B
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RS AGGARWAL-TIME AND WORK -EXERCISE 13B
  1. A alone can do a piece of work in 10 days and B alone can do it in 15 ...

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  2. A man can do a piece of work in 5 days. He and his son working togethe...

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  3. A can do a job in 16 days and B can do the same job in 12 days. With t...

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  4. एक काम को ख़त्म करने में A , B की तुलना में 50 % समय अधिक लेता है...

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  5. A works twice as fast as B. If both of them can together finish a piec...

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  6. A alone can finish a piece of work in 10 days which B alone can do in ...

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  7. The rates of working of A and B are in the ratio 3:4.The number of day...

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  8. A and B together can do a piece of work in 12 days; B and C can do it ...

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  9. 3 men or 5 women can do a work in 12 days. How long will 6 men and 5 w...

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  10. A can do a piece of work in 15 days. B is 50% more efficient than A, B...

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  11. A does 20% less work than B. If A can finish a piece of work in 7(1)/(...

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  12. A किसी काम को 20 दिनों में कर सकता हैजबकि बी उसी काम को 12 दिनों में क...

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  13. A can do a piece of work in 25 days , which B alone can do in 20 days....

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  14. दो पाइप A और B एक टैंक को क्रमश: 20 मिनट और 30 मिनट में भर सकते है । य...

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  15. एक नल किसी टंकी को 8 घंटे में भर सकता है और दूसरा पाइप 16 घंटे में खाल...

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  16. A pump can fill a tank in 2 hours. Due to a leak in the tank it takes ...

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  17. A tank fills two taps A and B in 10 hours and 12 hours respectively, w...

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