This is solid mensuration. I need help. Asap. Thankyou so much

7. A wooden cone of altitude 10 cm is to be cut into two parts of equal weight. How far from the vertex should the cut parallel to the base be made? A. 6.65 cm B. 3.83 cm C. 7.94 cm D. 8.83 cm 8. A sphere of radius 5 cm and a right circular cone of base radius 5 cm and a height 10 cm stand on a plane. Find the position of a plane that cuts the two solids in equal circular sections. A. 2 cm B. 2.5 cm C. 1.5 cm D. 3.2 cm 9. A regular triangular pyramid has an altitude of 9 m and a volume of 187.06 cu.m. What is the base edge in meters? A. 10 B. 11 C. 12 D. 13 10. If the edge of a cube decreases by x%, its volume decrease by 48.8%. Find the value of x. A. 10% B. 20% C. 16% D. 25% 11. Given a solid right circular cone having a height of 8 cm. has a volume equal to 4 times the volume of the smaller cone that could be cut from the same cone having the same axis. Compute the height of the smaller cone. A. 5.04 cm B. 3.25 cm C. 4.45 cm D. 2.32 cm