Question

A tank has two taps, first fills water in tank, and second empties the tank. Tank is filled in 4 hours, when only first tap opened and filled in 12 hours when both taps opened. How much time is taken to empty the full tank when only second tap is opened?

• A. 10 hours
• B. 4 hours
• C. 6 hours
• D. 8 hours

Answer 1

Answer: (C)