Problema Solution
a monument is to be constructed in the form of a frustum of a cone 22 feet in altitude, the radius of its top is 6 feet and the radius of the bottom is 13 feet. how many cubic feet of concrete is needed to construct such a monument?
Answer provided by our tutors
Let h be the height, R the radius of the lower base, and r the radius of the upper base.
now plug the values : h= 22
R= 13 and r= 6
we get V= 6 516.54667 cubic feet