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#31635 Bangla Language & Literature Pipe and Tank Level 0

A cistern can be filled in 10 hours but it takes 12 hours due to a leak in its bottom. If the cistern is full, then the time that the leak will take to empty it is:

  1. A 60 h
  2. B 60 min
  3. C 80 h
  4. D 90 h
Answer: A - 60 h

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