The figure shows a right circular cone on top of a half-sphere with the same radius. if the cone has a radius of 2 cm and height of 6 cm, what is the approximate volume of this solid? note: the volume of a cone is given by v = 1/3r2h and the volume of a sphere is given by v = 4/3r3. a. 59 cm3 b. 176 cm3 c. 42 cm3 d. 109 cm3