Question

the ratio of circumference of the two circle is 9:16.find the ratio of their areas​

Answer 1

Answer:

81:256

Step-by-step explanation:

ratio of circumference =9:16.

so ratio of area =81:256

Answer 2

Answer:

81/256

Step-by-step explanation:

$2 \times \pi \times r1 \div 2 \times \pi \times r2 \\ r1 \div r2 = 9 \div 16 \\ area \: of \: circle \: = \pi \times r {}^{2} \\ ratio \: = r1 {}^{2} \div r2 {}^{2} \\ {9}^{2} \div 16 {}^{2} = 81 \div 256$