Question

i) The ratio of radii of two circles is 3 : 4, find the ratio of their areas.
ii) The ratio of circumference of two circles is 2:3. Find ratio of their areas.​

Answer 1

Answer:

1. 9:16

2. 4:9

Step-by-step explanation:

1 ratio of r = 3:4

ratio of there areas = πr²/πR²

= r²/R²

= 3²/4²= 9/16

2 . 2πr/2πR = r/R = 2/3

πr²/πR² = r/R = 2/3