Question

find the area of a circle whose diameter is 8.4 metre

Answer 1

therefore radius = d/2
r= 8.4/2=4.2
area=πr²
area= 22/7×4.2×4.2
area=22×0.6×4.2
area=22×2.52
area= 55.44cm²

Answer 2

D = 8.4 m
R = 4.2 m
area of circle = π r²
= 22/7 ×4.2×4.2
=22×0.6×4.2
= 55.44 m²