Question

find the circumfernce of a circle who diameter is 15.4

Answer 1

Hi there!!

Let r be the radius of the circle ,
given that -

d =
$15.4 \: unit \:$
r =
$\frac{154}{20} = \frac{77}{10}$

Circumference of circle = 2πr

=>
$2 \times \frac{22}{7} \times \frac{77}{10} \\ \\ = >2 \times \frac{11 \times 11}{5} \\ \\ = > \frac{121 \times 2}{5} \\ \\ = > \frac{242}{5} \\ \\ = > 48.4 \: unit$
Hope this helps u !!