Geometry ! will mark ! a cone with a base area of 9pi and height of 4, what is its volume in pi? what is the surface area of the cone in pi?

The base of cone is a circle.

The formula of area of a circle:

We have:

Calculate the length of radius r:

The formula of a volume of a cone:

Substitute:

The formula of a surface area of a cone:

We need a length of l. Use the Pythagorean theorem:

Calculate the surface area:

V = 12π, SA = 24π

22 dimes and 9 nickels

step-by-step explanation:

step-by-step explanation:

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