Solution: What is the upper base edge of the frustum of a regular triangular pyramid?

(Last Updated On: December 20, 2017)

What is the upper base edge of the frustum of a regular triangular pyramid?

Problem Statement: CE Board November 1995

The volume of the frustum of a regular triangular pyramid is 135 cu. m. The lower base is an equilateral triangle with an edge of 9 m. The upper base is 8 m above the lower base. What is the upper base edge in meters?

Problem Answer:

The upper base edge of the frustum of a regular triangular pyramid is 3 m.

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Solution: What is the upper base edge of the frustum of a regular triangular pyramid?
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