Question

The circumference of a circle is 31.4 cm. Find the radius and the area of the circle? (Take $\pi$ = 3.14)

Answer 1

Circumference = $2\pi r$ = $31.4$ $cm$
= $2 \times 3.14 \times r = 31.4$ $r$
= $5$ $cm$
Area = $3.14 \times 5 \times 5$
= $78.50$ $cm^2$