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Home > PC > Chapter 4 > Lesson 4.2.3 > Problem 4-101


A cone has a height of 10 inches and a radius of 4 inches. If a plane cuts the cone x inches below the cone's peak, what is the area of the circular cross section? Homework Help ✎

Find r first in terms of x using proportions.

Area = π r2
Substitute your result for r into the area formula.