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Home > GC > Chapter 12 > Lesson 12.1.2 > Problem 12-20

12-20.

Find the volume of a cone if the circumference of the base is 28π inches and the height is 18 inches. Homework Help ✎

The formula for the circumference of a circle is 2πr.

28 = 2r

28π = 2πr

r = 14

Base = r²π
= 14²π
= 196π

≈ 3694.5 in³