To help answer this question we need two formulae.

🔹Surface Area of a cone: πrl+πr²

(where l is the slanted height)

🔹Volume of a cone: 1/3*πr²h

(where h is the perpendicular height)

The question gives us the volume of the cone already. So we can equal this volume to our volume of cone equation:

1/3*πr²h = 768π

If we divide by π on both sides, it will disappear, giving;

1/3*r²h = 768

Let’s... more

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Priya Ahmed
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2 years ago


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