Question

what is the formula of frustum of cone​

Answer 1

Answer:

Using the same Similar triangles property lets find the value of h, R/ r = (H+h)/ h. Therefore, the volume (V) of the frustum of the cone is =1/3 πH (R2 +Rr+r2 ).

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Answer 2

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$\Large\fbox{\color{purple}{QUESTION}}$

SURFACE AREA VOLUME FORMULAS

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$\Large\mathcal\green{FRUSTUM}$

$\implies \: tsa = \pi \: l(r1 + r2) + \pi \: {r1}^{2} + \pi {r2}^{2}$

$\implies \: csa = \pi \: l(r1 + r2)$

$\implies volume = \frac{1}{3}\pi \: h( {r1}^{2} + r1.r2 + {r2}^{2} )$

$\implies slant \: hieght = \sqrt{h - ( {r1}^{2} + {r2}^{2}) }$

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