Question

Find the circumference of a circle whose radius is 31/2

Answer 1

Answer:

given:

radius = 31/2 units

circumference of circle =

2πr

π = 22/7

by putting values

2×22/7×31/2

= 682/7

= 97.4 units (answer)

Answer 2

Circumference of circle =2πr

$= 2 \times \frac{22}{7} \times \frac{31}{2}$

$= 2 \times \frac{11}{7} \times 31$

$= 2 \times \frac{341}{7}$

$= \frac{682}{7}$

=97.42