A cistern is normally filled in 6 hours, but a leak makes it take 8 hours. How long would the leak alone take to empty a full cistern?

A cistern is normally filled in 6 hours, but a leak makes it take 8 hours. How long would the leak alone take to empty a full cistern?

  1. a) 24 hours
  2. b) 30 hours
  3. c) 36 hours
  4. d) 48 hours

From the BB Assistant Director (General) July 2026 – Preliminary exam, question 52 of 100.

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