Question

Q19)Area of circle of radius 7m is
Δ9m
7m
154m
308m​

Answer 1

Given:

A circle with

• Radius = 7 m

What To Find:

We have to find the area of the circle.

Formula For Finding:

Area of the circle = πr²

What The Values Stand For:

• π = 22/7
• r = radius

Solution:

Using the formula,

$\sf \Rightarrow Area \: of \: the \: circle = \pi r^2$

Substitute the values,

$\sf \Rightarrow Area \: of \: the \: circle = \dfrac{22}{7} \times 7 \: m \times 7 \: m$

Cancel 7 and 7,

$\sf \Rightarrow Area \: of \: the \: circle = 22 \times 7 \: m$

Multiply 22 and 7,

$\sf \Rightarrow Area \: of \: the \: circle = 154 \: m^2$

Verification:

$\sf \Rightarrow 154 \: m^2 = \dfrac{22}{7} \times 7 \: m \times 7 \: m$

Cancel 7 and 7,

$\sf \Rightarrow Area \: of \: the \: circle = 22 \times 7 \: m$

Multiply 22 and 7,

$\sf \Rightarrow Area \: of \: the \: circle = 154 \: m^2$

∴ Thus, the area of the circle is 154 m².

Answer 2

$\huge{\color{pink}{\underline{\underline\color{blue} {\textbf{\textsf{GIVEN}}}}}}$

radius=7 cm

$\huge{ \color{pink}{\underline{\underline\color{blue} {\textbf{\textsf{FIND}}}}}}$

Area of circle

$\huge{ \color{pink}{\underline{\underline\color{blue} {\textbf{\textsf{FORMULA \ USED}}}}}}$

$\pink{pi \ r^2}$

R is for $\pink{radius}$

π value is $\: \: \: \dfrac{22}{7}$

$\huge{ \color{pink}{\underline{\underline\color{blue} {\textbf{\textsf{SOLUTION}}}}}}$

Area of a circle=${π \ r^2}$

Area of a circle=$\: \: \: \dfrac{22}{7}$×7 ×7

Area of a circle=$\: \: \: \dfrac{22} {7}$× ${\cancel {7}$×7

∴ Area of a circle=22×7

∴Area of a circle=154 ${m^2}$

Hence area of a circle is 154 m^2