Question

A hemispherical bowl has redius 7 cm. find its curved surfaced area.​

Answer 1

$\Large{\bf{\green{\mathfrak{\dag{\underline{\underline{Given:-}}}}}}}$

• A Hemispherical bowl has a radius of 7 cm.

$\Large{\bf{\orange{\mathfrak{\dag{\underline{\underline{To \: Find:-}}}}}}}$

• CSA of hemispherical bowl.

$\Large{\bf{\red{\mathfrak{\dag{\underline{\underline{Solution:-}}}}}}}$

• Radius of the Hemispherical bowl = 7 cm

• CSA = ?

We know that,

$\boxed{\pink{\sf CSA \: of \: Hemisphere \: = \: 2 \pi r^2 \: units^2}}$

• Here,

• r = 7 cm

Substituting the values,

• $\sf CSA \: = \: 2 \: * \: \dfrac{22}{7} \: * \: 7^2$

• $\sf CSA \: = \: 2 \: * \: \dfrac{22}{7} \: * \: 7 \: * \: 7$

• $\sf CSA \: = \: 2 \: * \: \dfrac{22}{\cancel{7}} \: * \: \cancel{7} \: * \: 7$

• $\sf CSA \: = \: 2 \: * \: 22 \: * \: 7$

• $\sf CSA \: = \: 308 \: cm^2$

Therefore,

• CSA of Hemispherical bowl = 308 cm².

Answer 2

Answer:

Given

• A hemispherical bowl has redius 7 cm.

To Find

• CSA of Hemispherical bowl

Using Formula

$\dag{\underline{\boxed{\sf{CSA \: of \: hemisphere = {2{\pi}{r}^{2}}}}}}$

Where

• ${\sf{\pi}={\dfrac{22}{7}}}$
• ${\sf{r=radius}}$

Solution

$\quad {: \implies{\sf{CSA \: of \: hemisphere = {2{\pi}{r}^{2}}}}}$

• Substituting the values

$\quad {: \implies{\sf{CSA \: of \: hemisphere = {2 \times {\dfrac{22}{7}} \times {7}^{2}}}}}$

$\quad {: \implies{\sf{CSA \: of \: hemisphere = {2 \times {\dfrac{22}{7}} \times {7 \times 7}}}}}$

$\quad {: \implies{\sf{CSA \: of \: hemisphere = {2 \times {\dfrac{22}{\cancel{7}}} \times {{\cancel{7}} \times 7}}}}}$

$\quad {: \implies{\sf{CSA \: of \: hemisphere = {2 \times{22} {\times 7}}}}}$

$\quad {: \implies{\sf{CSA \: of \: hemisphere = {308 \: {cm}^{2} }}}}$

$\dag{\underline{\boxed{\sf{CSA \: of \: hemisphere = 308 \: {cm}^{2}}}}}$

$\therefore{\underline{\sf{CSA \: of \: hemisphere \: is \: 308 \: {cm}^{2}}}}$