Question

Find the area of circle whose radius is 9.4 m​

Answer 1

Step-by-step explanation:

area of circle=2πr²=2(22/7)(9.4)²=555.40 sq.m

Answer 2

Answer :-

$277.7 \: {m}^{2}$

Step-by-step explanation :-

GIVEN :-

Radius of the circle = 9.4m

TO FIND :-

Area of the circle

FORMULA USED :-

$area \: of \: the \: circle \: = \: \pi r{}^{2}$

HOW TO SOLVE :-

As we know, the formula of the area of a circle is $\pi \: {r}^{2}$. So, we have to put the value of the given radius in the formula, for the answer. And it should be noted that, the unit is square metres.

SOLUTION :-

$\pi r{}^{2} \: \ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ = \pi \times {(9.4)}^{2} \: \: \: \: \: \: \: \: \: \: \\ = \frac{22}{7} \times 9.4 \times 9.4 \\ = 277.7m {}^{2} \: \: \: \: \: \: \: \: \: \: \: \:$

So, area of the circle is $277.7 \: m {}^{2}$.

MORE FORMULAS TO KNOW :-

✧ Circumference of a circle = $2\pi \:r$

✧ Area of the circle = $\pi \: {r}^{2}$

✧ Area of a semicircle = $\frac{1}{2} \pi \:r {}^{2}$

✧ Area of a quadrant of a circle = $\frac{\pi \: r {}^{2} }{4}$