Question

find the areas of the circular region whose radii are 21cm​

Answer 1

Answer:

area =22÷7 ×21×21

Step-by-step explanation:

area= 22×3×21

area= 66×21

area=1386

Answer 2

Answer:Radius of circular region is ,r=21cm

So area of circle =22/7×r^2

=22/7×21×21

=22×3×21

=22×63

=1386cm^2