Question

Draw concentric circles for the radii $6.2cm$ and $8.1cm.$ Find out the width of the circular ring.

Answer 1

Step $1-$ Draw a circle with radius $r=6.2cm$ and name the centre as $O.$

Step $2-$ Taking $O$ as the center, draw another circle of radius $R=8.1cm.$

The resulting figure is the required concentric circles.

Then the width of the circular ring will be,

$R-r=8.1-7.2$

$=0.9cm$