Question

The circumference of a circle is 31.4 centimeters. What is the area of the circle

Answer 1

circumference of circle=2πr
2πr=31.4
π be 3.14
$r = \frac{31.4}{2 \times 3.14} \\ r = \frac{10}{2} = 5cm$
radius =5cm
area=πr^2
$\frac{22}{7} \times {5}^{2} = \frac{22}{7} \times 25 \\ \frac{550}{7} {cm}^{2}$