Find the circumference of a circle whose radius is $$28\ cm$$
Given radius $$=28\ cm$$
We know that, Circumference of the circle i.e, $$C=2\pi r$$
$$=(2\times 22/7\times 28)$$
$$=(56\times 22/7)$$
$$=176\ cm$$
Thus, the circumference of the circle is $$176\ cm$$