Question

How to find the height of the frustum

Answer 1

l^2=h^2+(r1-r2)^2 .........this formula is used the find slant

height.

so...

l= root of (h^2+(r1- r2)^2)

so....

h=root of(l^2-(r1-r2)^2)

Answer 2

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$\bf\Huge\red{\mid{\overline{\underline{ ANSWER }}}\mid }$

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

SURFACE AREA VOLUME FORMULAS

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

$\Large\mathcal\green{FRUSTUM}$

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

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

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

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

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