Question

Find the area of a circle whose diameter is 7cm​

Answer 1

3.5pi

Explanation:

just multiply together and you'll get your answer

Answer 2

38.5 cm^2

Explanation:

Diameter ( d ) = 7 cm

Radius ( r ) = 7 / 2 cm

Formula : -

Ar ( circle ) = π r^2

π r^2

= ( 22 / 7 ) x ( 7 / 2 )^2

= ( 22 / 7 ) x ( 49 / 4 )

= 38.5 cm^2