Question

The radius of a circle is $28cm$ find the circumference and area.

Answer 1

circumference $=2\pi r=2\times \frac{22}{7}\times 28=22\times 8=$

$=176cm$

Area $=\pi r^2=\frac{22}{7}\times 28\times 28=88\times 28$

$=2464c{m}^2$