Question

the circumference of a circle is 132 cm find its area

Answer 1

$circumference = 132 \\ 2\pi r = 132 \\ 2 \times \frac{22}{7} \times r = 132 \\ \frac{44}{7} \times r = 132 \\ r = 132 \times \frac{7}{44} \\ r = 3 \times 7 = 21cm \\ area \\ \pi \: r {}^{2} \\ \frac{22}{7} \times 21 \times 21 \\ 22 \times 3 \times 21 \\ 1386cm {}^{2}$

Answer 2

Circumference of circle = 2*(22/7)r. (132*7)/22*2=r. r=21cm. Area = (22/7)*21*21=1386cm*cm