[SOLVED] Applications of Partial Derivatives-Cone 1. The problem statement, all variables and given/known data (Q) (Q) If a cone grows in height by dh/dt = 1 and in radius by dr/dt = 2, starting from zero, how fast is its volume growing at t =3? 2. Relevant equations 3. The attempt at a solution By applying the chain rule for partial derivatives, I obtained: ∂V/∂t=(2/3 πrh)(dr/dt)+(1/3 πr^2 )(dh/dt) However, I do not know how to proceed from here on. Please help me.