Question

The section of a right circular cone by a plane through its vertex perpendicular to the base is an equilateral triangle of side 12 cm. The volume of the cone is

• A. $70\sqrt{2}\pi {\text{cm}}^3$
• B. $72\sqrt{3}\pi {\text{cm}}^3$
• C. $71\sqrt{3}\pi {\text{cm}}^3$
• D. $69\sqrt{2}\pi {\text{cm}}^3$

Answer 1

Answer: (B)

Diameter of base $=12\text{cm}$

Radius $=6\text{cm}$

slant height $l=12$