Question: A cistern is filled by a tap in 15 hours. Due to a leak in the bottom of the cistern, it takes 5 hours

A cistern is filled by a tap in 15 hours. Due to

A cistern is filled by a tap in 15 hours. Due to a leak in the bottom of the cistern, it takes 5 hours longer to fill the cistern. If the cistern is full how long will it take the leak to empty it?(assume rate of leakage will be constant). 1. 70 hours 60 hours 3. 30 hours 4. 40 hours 5. 50 hours 2.

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