A cistern is filled by a tap in 3 1/2 hours. Due to leak... — Answer & Explanation | PrepBeePakistan

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MEDIUMENGLISHMathematics

A cistern is filled by a tap in 3 1/2 hours. Due to leak in the bottom of the cistern, it takes half an hour longer to fill the cistern. If the cistern is full how long will it take the leak to empty it?

Correct answer: B

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