exam Maths Puzzle Numerical Ability

I have hourglass figure. Total h=10. Upper cone radius=3. Lower cone radius=5 Find Volume

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I really need help with this stuff I get so confused.
Given f(x)=-4x-4, find f(2) 1.Prove the Proclus property.
2.Prove that every angle has a supplementary angle.
3.Prove that if A, B, C are non-collinear points the interior of triangle ABC is the intersecti