Question

what is the area in cm2 of a circle whose circumference is 22

Answer 1

Circumference = 22
=> 2πr = 22
=> πr = 22
$=> \frac{22}{7} \times r= 22 \\ \\ => r = \frac{22 \times 7}{22} \\ \\ => r = 7 \: cm$



Area of circle = Circumference × r / 2

Area of circle = ( 22 × 7 ) / 2

Area of circle = 11 × 7

Area of circle = 77 cm²