1. A regular tetrahedron whose altitude is 18 in., is cut by a plane parallel to its base, 12 in. from the base. Find the ratio of the volume of the tetrahedron cut off by the said plane to the volume of the original tetrahedron. Also, find the ratio of their base areas and the ratio of their base edges.

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A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

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A: Note that : Since you have posted multiple questions, we will provide the solution only to the first…

Q: 1. Derive the formula for the total surface area of a right circular cone with radius r and altitude…

A: The right circular cone can be drawn as,

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A: Topic:- volume

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