Question

find voulme and surface area of sphere radius 5.6​

Answer 1

$Given \: radius \:of \: a \: sphere (r) = 5.6$

$i) Volume \: of \: the \: sphere (V) = \frac{4}{3} \pi r^{3}$

$= \frac{4}{3} \times \frac{22}{7} \times (5.6)^{3}$

$= \frac{4}{3} \times \frac{22}{7} \times 5.6\times 5.6 \times 5.6$

$= \frac{2207.744}{3}$

$= 735.915 \: cubic \: units$

$ii) Surface \: area \:of \: the \: sphere = 4 \pi r^{2}$

$= 4 \times \frac{22}{7} \times (5.6)^{2}$

$= 4 \times 22 \times 5.6 \times 0.8$

$= 394.24 \:square \: units$

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Answer 2

${\tt{\purple{\underline{\underline{\huge{Answer:}}}}}}$

$\large{Given:-}\\ \sf\dashrightarrow \: radius \:of \: a \: sphere (r) = 5.6$

$\sf\therefore Volume \: of \: the \: sphere (V) = \frac{4}{3} \pi r^{3}$

$\sf\implies \dfrac{4}{3} \times \dfrac{22}{7} \times (5.6)^{3}$

$\sf\implies \dfrac{4}{3} \times \dfrac{22}{7} \times 5.6\times 5.6 \times 5.6$

$\sf\implies \dfrac{2207.744}{3}$

$\sf\implies 735.915 \: cubic \: units$

$\sf\therefore Surface \: area \:of \: the \: sphere = 4 \pi r^{2}$

$\sf\implies4 \times \dfrac{22}{7} \times (5.6)^{2}$

$\sf\implies 4 \times 22 \times 5.6 \times 0.8$

$\sf\implies 394.24 \:square \: units$

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