Question

if the radius of circle doubled what is area of ratio of new circle to given circle.

Answer 1

I hope this helps....

Answer 2

Hey mate.
________

Let, the radius of the circle be r

Then,

The area of the circle = 2πr

Now,

Given,

The radius of the circle is doubled i.e. 2r

So,

The area of the new circle = 2π (2r)

= 4πr

Thus,

The ratio of the area of new circle to the given circle is :-


= 4πr / 2πr

= 2 / 1

= 2 : 1

Hope it helps ! ✓✓