Question

Q-22 The ratio of the areas of the two circles is
16:25 the ratio of their radius is


plss tell the ans ​

Answer 1

Answer:

4:5

Step-by-step explanation:

Let the radii of the circles be r1 & r2 respectively.

Then, their circumferences are 2πr1 & 2πr2, respectively.

So, their ratio=2πr1:2πr2=r1:r2.

Again, the areas of the circles are π(r1)2 & π(r2)2.

Then, their ratio =π(r1)2:π(r2)2=(r1)2:(r2)2=16:25     ...(given).

∴(r1):(r2)=16:25=±(4:5)

We reject the negative value of r's since the radius is a length.

∴(r1):(r2)=(4:5).

Answer 2

hope it will help you