Question

Find the area and circumference of a circle whose
diameter is 6.3 cm. (Take π= 3.14)
​

Answer 1

Step-by-step explanation:

D=6.3

R=6.3/2=3.15

$a = \pi \: r ^{2}$

A=3.14×3.15×3.15

=31.15665

=31.16cm²

$p = 2\pi \: r$

p=2×3.14×3.15

=19.782

=19.78cm

Answer 2

Answer:

Given diameter of the circle = 6.3 cm

So, the radius = diameter/2 = 6.3 cm/2 = 3.15 cm

We know that circumference of a circle = 2πr

⇒ 2 x 3.14 x 3.15

⇒ 19.78 cm

∴ Circumference of the circle = 19.78 cm

We know that the area of the circle = πr²

⇒ 3.14 x 3.15²

⇒ 3.14 x 3.15 x 3.15

⇒ 31.15 cm²

∴ Area of the circle = 31.15 cm²