A cistern is normally filled with eater in 10 hours but takes 5 hours longer to fill because of a leak in its bottom . If the cistern is full, the leak will empty the cistern in -

A cistern is normally filled with eater in 10 hours but takes 5 hours longer to fill because of a leak in its bottom . If the cistern is full, the leak will empty the cistern in - Correct Answer 30 hours

Work done by the leak in one hour 110 - 115 = 3 - 230 = 130The leak will empty the cistern  = 30 hours
Bissoy MCQ

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