Multiple Choice Questions on Two taps A and B can empty a cistern in 2 hours and 60 minutes respectively If both the taps are ope........... for IBPS RRB - Office Assistant/ Clerical Exam Preparation

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Multiple Choice Questions

Two taps A and B can empty a cistern in 2 hours and 60 minutes respectively If both the taps are ope...........

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    Two taps A and B can empty a cistern in 2 hours and 60 minutes respectively. If both the taps are opened simultaneously then in how much time both the taps together will empty the completely filled tank? 

    This questions was previously asked in
    RRB Clerk Prelims (13 Aug, 2022 Shift 1)
    View All RRBB Previous Year Papers

    30 minutes 

    Incorrect Answer

    25 minutes 

    Incorrect Answer

    47 minutes

    Incorrect Answer

    40 minutes

    Correct Answer

    16 minutes

    Incorrect Answer
    Explanation:

    - Tap A can empty the cistern in 120 minutes (2 hours).

    - Tap B can empty the cistern in 60 minutes (1 hour).

    - Tap A's emptying rate is 1/120 of the cistern per minute.

    - Tap B's emptying rate is 1/60 of the cistern per minute.

    - Together, both taps can empty 1/120 + 1/60 = 1/40 of the cistern per minute.

    - Therefore, both taps together will take 40 minutes to empty the cistern.

    Correct Answer: Option 4 - 40 minutes

    By: Parvesh Mehta
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