SOLUTION: Find the number of cubic units in the volume of a frustum of a right circular cone if the frustum has a base radius of 9 units, top radius of 3 units and a slant height of 10 units

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Question 407164: Find the number of cubic units in the volume of a frustum of a right circular cone if the frustum has a base radius of 9 units, top radius of 3 units and a slant height of 10 units.
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
The height of the top cone would be 4 units, while that of the bigger cone (containing the smaller) is 12 units.
The the volume of the frustum is
%28pi%2A9%5E2%2A12%29%2F3+-+%28pi%2A3%5E2%2A4%29%2F3+=+312pi cubic units.