Question

The area of a circle A is nine times area of
circle B find the ratio of radius of A
to that of circle B using it find the
radius of circle A If the radius of circle B
14 cm​

Answer 1

Answer:

Area of A = 9 * Area of B

Areaof A / Area of B = 9

$\pi {r1}^{2} \: \div \: \pi {r2}^{2} = 9$

${r1}^{2} \div {r2}^{2} = 9$

$r1 \div r2 = \sqrt{9 } = 3$

Ratio of radius is 3 : 1

Radius of A = r1 = 3*r2

Radius of r1 = 3*14

RADIUS OF CIRCLE A = 42 cm