Question

The ratio of the cirumference of two circles is 4:1. Find the ratio of their areas.
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Answer 1

Answer:

16:1

Step-by-step explanation:

Let r1 and r2 are the radii of the circles.

Ratio of circumferences = c1/c2 =(2pi (r1))/2pi(r2))

r1/r2 =4/1⇒ r1 =4r2

ratio of areas is A1:A2

A1/A2 = pi (r1)^2/pi (r2)^2

A1/A2 =4r2^2/r2^2

= 16:1