Another problem in related rates.. hope you can help me find how to have the correct answer.
Water, at the rate 10 ft3/min, is pouring into a leaky cistern whose shape is a cone 16' deep and 8' in diameter at the top. At the time the water is 12' deep, the water level is observed to be rising 4"/min. How fast is the water leaking away?
Answer: (10 - 3pi)ft3/min
Thank you! :)