Question

diameter =63 find its radius and circumference
​

Answer 1

radius is half of diameter

63\2

=31.5

Answer 2

Answer:

$r = \frac{63}{2} \\ \\ therefore \\ circumference \: of \: circle \\ = 2\pi \times r \\ = 2 \times \frac{22}{7} \times \frac{63}{2} \\ = 2 \times 11 \times 9 \\ = 198 \: {unit}^{2}$