Question

Find the radius of a circle whose circumference is 30.8 metre.

Answer 1

Answer:

r= 30.8m

circumference= 2πr

                       = 2× 3.14× 30.8

                       = 193.424m

Answer 2

$c = 2\pi \: r$

$r = \frac{c}{2\pi \: }$

$r = \frac{30.8}{2 \times 3.14}$

r=4.9