For this case what you should know is that by definition the volume of the cone is given by: V = ((pi) * (r ^ 2) * (h)) / (3) Remembering that: r = d / 2 Substituting the values: V = ((pi) * ((d / 2) ^ 2) * (h)) / (3) V = ((pi) * (((10) / 2) ^ 2) * (12)) / (3) V = 314.16 ft ^ 3 Answer: V = 314.16 ft ^ 3 The nearest option is: 300 cu. ft
