Question

The circumference of a circle is 10 pie cm. What is the radius of the circle

Answer 1

Hey there!

Circumference of circle=(10×22/7)cm=220/7cm
Let radius be r cm
So,according to problem,
2×22/7×r=220/7
44r/7=220/7
44r×7=220×7
r=(220×7)/(7×44)=5
So,the radius is 5 cm.

Hope you got some help!

Answer 2

$circumference \: of \: circle \: = 2\pi r \\ circumference = 10\pi \: cm \: \: \: \: \: (given) \\ 2\pi r = 10\pi \: \: cm\: \\ 2r = 10 \: cm \\ r = 5 \: cm\\ r \: \: means \: radius$