7.2 HW#17: Volume of a frustum with square base of side 23, square top of side 9 and height 20

Описание к видео 7.2 HW#17: Volume of a frustum with square base of side 23, square top of side 9 and height 20

Disk/Washer method chapter.
But Slice is a square here! A(x)=(2x)^2, but this is dy case. Thus, we create the equation of the line through two points to solve for x.
Find the volume of a frustum of a pyramid with square base of side 23, square top of side 9 and height 20.

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