Question

Find the radius of a circle with a circumference of 4/3 pi.

Answer 1

radius = 212121

Explanation:

circumference =

`2\pi \: r`

From the question circumference is 4/3

4/3 = 2 × 22/7 x r

4/3 = 44/7 × r

4/3 = 44r/7

LCM of 3 and 7 is 21

21× 4/3 = 44r/7 × 21

7 × 4 = 3 × 44r

28 = 132r

28/132 = 132r/132

0.212121 = r

therefore the radius is 0.212121.