Consider a right cone (pointed downwards) that is leaking water. the dimensions of the conical tank are a height of 13 ft and a radius of 8 ft. how fast (in ft/min) does the depth of the water change when the water is 11ft high if the cone leaks water at a rate of 11 ft^3/min? ft/min. find the rate (in ft^2/min) at which the surface area of the water changes when the water is 11 ft high if the cone leaks water at a rate of 11 ft3/min.