Question

find the radius of a circle whose circumference is 4.4 CM

Answer 1

$circumference = 2\pi \: r$
so, 4.4=2×22/7×r. ; 4.4×7/22×2=r. r=30.8/44=0.7 r=0.7cm

Answer 2

Given :

circumference is 4.4 CM

To Find :

find the radius of a circle

Solution:

Circumference of circle = $2 \pi r$

We are given that circumference is 4.4 CM

So,$2 \pi r = 4.4$

$2 \times \frac{22}{7} \times r = 4.4$

$r = \frac{4.4 \times 7}{2 \times 22}$

r=0.7

Hence The radius of circle is 0.7 cm