Question

consider two concentric circles where the ratio of circumferences is 3:2. the circumference of the large circle is 42pi what is the area of the smaller circle

Answer 1

Step-by-step explanation:

ratio of the radius is same as circumference

r1=r2

circumference of large circle =42pi

2*pi*r1= 42pi

2*r1=42

r1=42/2=21

therefore radius of the smaller circle = 21*2/3

=14cm

area= pi*r² or pi* 14²= 196pi

=22/7 *196

=616cm²

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