Question

2 Points

The circumference of a circle is represented by 277. If the radius of the circle is
doubled, then the circumference is
• A. increased by 2
B. doubled
• C. multiplied by 4
D. squared​

Answer 1

B. Doubled

Explanation:

The formula to find the circumference of the circle is

`C=2\pi r`

Now our problem says that the radius is doubled. Hence the new radius is 2r

Hence the new circumference will be

`C'=2 \pi 2r`

`= 2 * 2\pi r`

`=2C`

Hence our circumference gets doubled.