Question

Ratio of radii of two circles is 2 : 5. The ratio of their areas is . please answer this fast

Answer 1

Answer:

The ratio of their areas is 4:25.

step by step explaination:

2πr1/2πr2=2/5

r1/r2=2/5

Squaring both the sides, we get,

r1²/r2²= 4/25

Answer 2

Answer:

Let us consider their radii are 2x and 5x

their area = pi × r^2

area of circle with radiii 2x = pi × 4x^2

area of circle with radii 5x = pi × 25x^2

their ratio = (pi × 4x^2)/pi × 25x^2 = 4:25

Hope it helps ✌️