Question

find the circumfrence of a circle whose radius is 5cm

Answer 1

$c = 2\pi \: r$
$2 \times \frac{22}{7} \times \5 \\ =2 \times \frac{55}{14} \\ = \frac{110}{14 } \\ = 7.85$
.
.
.
.
.
.
.
.
.
.
.
#Ninja

Answer 2

HI
Circumference of a circle =  2 × π × r
r = 5,
Circumference = 2*22/7*5
                       or= 2*3.14*5
                          = 31.42 cm

HOPE IT HELPS U
THANK U 
BYE