If an inverted conical container with a bottom radius of R cm and a height of H cm is filled with water at the speed of N cubic centimeter per second, the rate of water surface rising in t second is calculated If the answer is very detailed, I will increase the reward points

If an inverted conical container with a bottom radius of R cm and a height of H cm is filled with water at the speed of N cubic centimeter per second, the rate of water surface rising in t second is calculated If the answer is very detailed, I will increase the reward points

Let V 'be the derivative of volume with respect to time, and V' be the derivative of volume with respect to time
V=1/3*( πr^2)*vt
V’=1/3*( πr^2)*υ=n
υ=3n/(πr^2)