Question

If radius (r) 7cm, find diameter (d)and circumference (c)=?

Answer 1

diameter = r×2

= 14

$formula \: of \: circumference \: \\ = 2\pi \: r \: \\ = 2 \times \frac{22}{7} \times 7 \\ = 2 \times 22 \\ = 44cm \:$