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Tap 'A' can fill the tank completely in 6 hrs while tap 'B' can empty it by 12 hrs. By mistake, the person forgot to close the tap 'B', As a result, both the taps, remained open. After 4 hrs, the person realized the mistake and immediately closed the tap 'B'. In how much time now onwards, would the tank be full?

  • a)
    2 hours
  • b)
    4 hours
  • c)
    5 hours
  • d)
    1 hour
Correct answer is option 'B'. Can you explain this answer?
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Tap 'A' can fill the tank completely in 6 hrs while tap 'B' can empty ...
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Tap 'A' can fill the tank completely in 6 hrs while tap 'B' can empty ...
For these kind of questions, we can take a simple unit of 12L as assumption to solve the question faster.

Tap A fills at 2L per hour and Tap B empties at 1L per hour. By 4 hours net bucket filled = (2x4) - (1x4) = 4L. The remaining 8L can be filled by Tap A in 8L/2L per hour i.e. in 4hrs.
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Tap 'A' can fill the tank completely in 6 hrs while tap 'B' can empty it by 12 hrs. By mistake, the person forgot to close the tap 'B', As a result, both the taps, remained open. After 4 hrs, the person realized the mistake and immediately closed the tap 'B'. In how much time now onwards, would the tank be full? a)2 hoursb)4 hoursc)5 hoursd)1 hourCorrect answer is option 'B'. Can you explain this answer?
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Tap 'A' can fill the tank completely in 6 hrs while tap 'B' can empty it by 12 hrs. By mistake, the person forgot to close the tap 'B', As a result, both the taps, remained open. After 4 hrs, the person realized the mistake and immediately closed the tap 'B'. In how much time now onwards, would the tank be full? a)2 hoursb)4 hoursc)5 hoursd)1 hourCorrect answer is option 'B'. Can you explain this answer? for LR 2025 is part of LR preparation. The Question and answers have been prepared according to the LR exam syllabus. Information about Tap 'A' can fill the tank completely in 6 hrs while tap 'B' can empty it by 12 hrs. By mistake, the person forgot to close the tap 'B', As a result, both the taps, remained open. After 4 hrs, the person realized the mistake and immediately closed the tap 'B'. In how much time now onwards, would the tank be full? a)2 hoursb)4 hoursc)5 hoursd)1 hourCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for LR 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Tap 'A' can fill the tank completely in 6 hrs while tap 'B' can empty it by 12 hrs. By mistake, the person forgot to close the tap 'B', As a result, both the taps, remained open. After 4 hrs, the person realized the mistake and immediately closed the tap 'B'. In how much time now onwards, would the tank be full? a)2 hoursb)4 hoursc)5 hoursd)1 hourCorrect answer is option 'B'. Can you explain this answer?.
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