Question

ANSWER PLS........
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Answer 1

$\huge\fbox\pink{A}\fbox\blue{n}\fbox\purple{S}\fbox\green{w}\fbox\red{E}\fbox\orange{r}$

$\Large{\blue{\tt{\underline{\underline{Given \ :-}}}}}$

${\sf{☞ \ Radius \ of \ base \ = \ 35cm }}$

${\sf{☞ \ Height \ of \ cone \ = \ 84cm }}$

$\Large{\green{\tt{\underline{\underline{To \ find \ :-}}}}}$

${\sf{☞ \ Volume \ of \ cone \ = \ ?}}$

${\sf{☞ \ Curved \ surface \ area = \ ?}}$

${\sf{☞ \ Total \ surface \ area \ = \ ?}}$

$\Large{\purple{\tt{\underline{\underline{Formula \ used \ :-}}}}}$

${\sf{☞ \ Volume \: of \: cone \: = \pi {r}^{2} \frac{h}{3} }}$

${\sf{☞ \ Total \: surface \: area \: of \: cone \: = \pi \: lr \: \times\pi {r}^{2} }}$

${\sf{☞ \ Curved \: surface \: area \: of \: cone \: = \pi\:rl}}$

$\Large{\orange{\tt{\underline{\underline{Solution \ :-}}}}}$

${\sf{☯ \ Volume \: of \: cone \: = \frac{22}{7} \times 35 \times 35 \times \frac{84}{3}}} \\{\sf{ = 107800 \: {cm}^{3}}}$

${\sf{ᢰ \ Length \ of \ cone \ = \ ?}}$

${\sf{{ᢰ \ Length}^{2} \: = \: {height}^{2} + {base}^{2} }}$

${\sf{{ᢰ \ Length}^{2} = {35}^{2} + {84}^{2} }}$

${\sf{{ᢰ \ Length}^{2} = 1225 + 7056}}$

${\sf{ᢰ \ Length = \sqrt{8281} }}$

${\sf{ᢰ \ Length \: = 91 \: cm}}$

Now

${\sf{☯ \ Curved \: surface \: area \: = \frac{22}{7} \times 35 \times 91}} \\{\sf{ = 10010 {cm}^{2} }}$

${\sf{☯ \ Total \: surface \: area \: = \frac{22}{7} \times 35 \times 35 + 10010 }}\\ {\sf{= 13860 \: {cm}^{2} }}$

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Hope it's help ⚓⚓

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