Question

The ratio of area of two circles is 4 : 25, find the ratio of thier perimeter

Answer 1

Let the radius of two circles be r₁ and r₂

Then, according to question
πr₁² / πr₂² = 4/25
r₁ / r₂ = 2/5

Now,
Ratio of perimeter = 2 π r₁ / 2 π r₂
= r₁ / r₂
= 2 / 5

∴ Ratio of their perimeter is 2 : 5

Answer 2

Answer:

here is the answer for you dear.

Step-by-step explanation:

let the radius of two circles be r₁ and r₂

Then, according to question

πr₁² / πr₂² = 4/25

r₁ / r₂ = 2/5

Now,

Ratio of perimeter = 2 π r₁ / 2 π r₂

= r₁ / r₂

= 2 / 5

∴ Ratio of their perimeter is 2 : 5