Answer: (1/3) π r 2 h
Explanation:
The formula for the volume of a cone is V = (1/3)πr^2h, where r is the radius of the base, h is the height of the cone, and π is a constant approximately equal to 3.14.
Substituting the given values, we get:
V = (1/3)π(21)^2(25)
V = (1/3)π(441)(25)
V = (1/3)(3.14)(11025)
V = (1/3) π r 2 h
Therefore, the volume of the cone is approximately (1/3) π r 2 h.