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An inlet pipe can fill an empty tank in 3 minutes while an outlet pipe can empty this completely filled tank in 6 minutes. If the tank is empty, then in how many minutes would the tank be full when both the inlet and outlet pipes are open?
  • a)
    3
  • b)
    4.5
  • c)
    6
  • d)
    7.5
  • e)
    9
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
An inlet pipe can fill an empty tank in 3 minutes while an outlet pipe...
Given:
- The inlet pipe can fill an empty tank in 3 minutes.
- The outlet pipe can empty the completely filled tank in 6 minutes.

To find:
- In how many minutes would the tank be full when both the inlet and outlet pipes are open?

Approach:
- Let's assume that the capacity of the tank is 'x'.
- The inlet pipe can fill the entire tank in 3 minutes.
- Therefore, in 1 minute, the inlet pipe can fill 1/3rd of the tank.
- The outlet pipe can empty the entire tank in 6 minutes.
- Therefore, in 1 minute, the outlet pipe can empty 1/6th of the tank.
- When both pipes are open, the net inflow is (1/3 - 1/6) = 1/6th of the tank in 1 minute.

Calculation:
- To fill the entire tank, the net inflow should be equal to the capacity of the tank, which is 'x'.
- So, x/6 = t, where 't' is the time taken to fill the tank.
- Therefore, t = 6x.

Answer:
- The tank will be full in 6 minutes when both the inlet and outlet pipes are open.
- Hence, option 'C' is the correct answer.
Free Test
Community Answer
An inlet pipe can fill an empty tank in 3 minutes while an outlet pipe...
Ab/b-a

3*6/(3)=6
ans
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An inlet pipe can fill an empty tank in 3 minutes while an outlet pipe can empty this completely filled tank in 6 minutes. If the tank is empty, then in how many minutes would the tank be full when both the inlet and outlet pipes are open?a)3b)4.5c)6d)7.5e)9Correct answer is option 'C'. Can you explain this answer? for GMAT 2025 is part of GMAT preparation. The Question and answers have been prepared according to the GMAT exam syllabus. Information about An inlet pipe can fill an empty tank in 3 minutes while an outlet pipe can empty this completely filled tank in 6 minutes. If the tank is empty, then in how many minutes would the tank be full when both the inlet and outlet pipes are open?a)3b)4.5c)6d)7.5e)9Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for GMAT 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An inlet pipe can fill an empty tank in 3 minutes while an outlet pipe can empty this completely filled tank in 6 minutes. If the tank is empty, then in how many minutes would the tank be full when both the inlet and outlet pipes are open?a)3b)4.5c)6d)7.5e)9Correct answer is option 'C'. Can you explain this answer?.
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