Question

Find the curved surface area of a sphere with radius 7 cm.​

Answer 1

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☛ Radius of sphere is 7cm.

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$\huge \underbrace {\rm {{{\color{purple}{ \orange \dag \: To \: \: Find... \orange \dag}}}}}$

☛ Curved surface area of a sphere.

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$\huge \underbrace {\rm {{{\color{purple}{ \orange \dag \: Formula \: \: Using... \orange \dag}}}}}$

$\large\begin{gathered} {\underline{\boxed{ \rm {\red{Surface \: \: area \: \: of \: sphere \: = \: 4 \: \pi \: {r}^{2} }}}}}\end{gathered}$

$\large \underbrace {\rm {{{\color{purple}{ \orange \dag \: Substuting \: \: the \: \: values... \orange \dag}}}}}$

$\large\begin{gathered} {\underline{\boxed{ \rm {\green{Surface \: \: area \: \: = \: 4 \times \: \: \frac{22}{7} \: \times \: {7} \: ^{2} }}}}}\end{gathered}$

$\large\begin{gathered} {\underline{\boxed{ \rm {\green{Surface \: \: area \: \: = \: 4 \times \: \: \frac {22} { \cancel7} \: \times \: { 7} \: \times \cancel 7 }}}}}\end{gathered}$

$\large\begin{gathered} {\underline{\boxed{ \rm {\green{Surface \: \: area \: \: = \: 4 \: \times \: 22 \: \times \: 7 }}}}}\end{gathered}$

$\large\begin{gathered} {\underline{\boxed{ \rm {\green{Surface \: \: area \: \: = \: 88 \: \times \: 7 }}}}}\end{gathered}$

$\large\begin{gathered} {\underline{\boxed{ \rm {\blue{Surface \: \: area \: \: = \: 616 \: {cm}^{2} }}}}}\end{gathered}$

Hence , the surface area of sphere is 616 cm².

Answer 2

Step-by-step explanation:

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