Question

Q no F. Find the perimeter...

Answer 1

given diameter of the circle = 28cm

we know that diameter is double the length of it's radius.

therefore length of it's radius = 28/2 = 14cm

now, perimeter of circle is known as it's circumference.

formula to find circumference of a circle is 2πr.

hence, it's circumference = 2πr

= 2 × 22/7 × 14

= 2 × 22 × 2

= 88cm

Answer 2

$\large{\mathfrak{\underline{\underline{Solution:-}}}}$

_________________________

Diameter = 28 cm

∴ Radius = $\bf{\frac{28}{2} = 14 \:cm}$

(Since, diameter is two times of it's radius)

Circumference of a circle :

★ $\large{\boxed{Formula: 2πr}}$

ATQ,

$\large{= 2 \times \frac{22}{7} \times 14}$

$\large{= 2 \times 22 \times 2}$

$\large{= 44 \times 2}$

$\large{\boxed{\red{88\: cm}}}$