8. The diagonal of the vertical cross section of a cylinder is 10 cm and base radius is 3 cm. Find the area of the vertical cross section. 9. The diagonal of the vertical cross section of a cylinder is 13 cm and base radius is 6 cm. Find the area of the vertical cross section 10. If the surface area of the ball is 1441:, nd its volume. Express your answer in terms of 11' 11. If the surface area of the ball is 1961:, nd its volume. Express your answer in terms of 11