A grain bin consists of a cone stacked on top of a cylinder, where the radii of the cone and the cylinder are equal. The diameter of the cylindrical base of the grain bin is 12 ft, and the height of the cylinder is 10 ft, while the height of the cone is 8 ft. Calculate the surface area of the grain bin. Leave your answer in terms of ?.
a. 480? sq. ft.
b. 276? sq. ft.
c. 216? sq. ft.
d. 204? sq. ft.
