Question

WILL MARK AS BRAINLIEST IF ANSWERED CORRECTLY IN SIMPLEST FORM

Answer 1

Step-by-step explanation:

Diameter = 20 km

Radius = 20 / 2 = 10 km

Area = (pi)r^2 = 22/7 × 100 = 2200/7 = 314.2 km^2

Answer 2

Answer:

formula for are of circle is

$\pi {r}^{2}$

As here r=20km

Substituting the values we get

Area of circle =3.14*20*20

=1257.14km square