An equilateral triangle of side 14 centimeters is revolved about an altitude to form a cone. What is the number of cubic centimeters in the volume of the cone? Express your answer to the nearest whole number, without units.

how do we do this?!

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1. What is the formula for area of cone?

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2. or, more to the point, the volume of the cone is

1/3 pi r^2 h

you can figure r and h easily enough.

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posted by Steve

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