Question

The area of a circuit is 38.5
cm2. Its radius is ______.

1) 3.5 cm
2)2.5 cm
3) 3.6 cm
4) 4 cm
ا ا​

Answer 1

Answer:

$\huge \sf \fbox \color{blue}{} \fbox \color{teal}{} \fbox \color{green}{} \fbox \colorbox{yellow}{ANSWER}$

1 ) 3.5 cm

→ The area of a circuit is 38.5cm². Its radius is 3.5 cm.

Step-by-step explanation:

$\large \mathrm \color{black}{Given:-}$

Area of the circle = 38.5cm²

$\large \mathrm \color{black}{To \: find:-}$

Radius of the circle

$\large \underline \mathrm \color{black} Solution:$

Area of the circle = πr²

Let the Area be A and Radius be r

$= > \: 38.5 = \frac{22}{7} \times {r}^{2}$

$= > {r}^{2} = \frac{7}{22} \times 38.5$

$\large \mathrm \color{black}{divide \: 38.5 \: bye \: 22}$

$= > {r}^{2} = 7 \times 1.75$

$= > \: {r}^{2} = 12.25$

Taking square root on both the sides

$∴  \: r \: = 3.5$

∴ The radius of the circle of

$\large \rm \fbox \color{black} \fbox \color{black}{3.5cm}$