Question

If the radius of a circle is increased to 3 times, then how many times will it's circumference be increased?

Answer 1

earlier circumference was 2πr and when the radius is increased 3 times then it becomes 2π(3r) =6πr

Answer 2

Answer

Find out the how many times will it's circumference be increased if the radius of a circle is increased to 3 times .

To prove

Formula

$Circumference\ of\ circle = 2\pi r$

Where r is the radius of the circle .

As given

If the radius of a circle is increased to 3 times .

Radius becomes = 3r

Put in the formula

$Circumference\ of\ circle = 2\pi\times 3r$

$Circumference\ of\ circle = 6\pi r$

Therefore the circumference of the  increased  by 3 times .