Water is poured into an upside down open cone at a constant rate of 24cm^3 per second. Depth Of water at any time t seconds is hcm. What is the rate of increase of the area of the surface area of the surface S of the liquid when the depth is 16cm.

Surface Area S is the circukar area inside the cone. the radius of the base is 30cm and the heightof the cone is 30cm