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please help 18 show that the volume V of a regular tetrahedron, all of whose side lengths are s, is V = s'v2 (all four

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18 show that the volume V of a regular tetrahedron, all of whose side lengths are s, is V = s'v2 (all four faces of a regular tetrahedron are equilateral triangles). Hence find the rate of increase of the surface area when the volume is 144V2 cm and is increasing at a rate of 12 cm/s

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