Question

A tank of water in the shape of an inverted cone is being filled with water at rate of 12m^3/min. the base radius of tank is 26 meters and the height of the tank is 8 meters. at what rate is the depth of the water in the tank changing when the rains os the top of the water is 10 meters?

Answer 1

There are lots of similar questions answered below in the related questions section.

And unless it's a rain tank, you probably mean "radius."