Question

If the circumference of the circle is 132 m. Then calculate the radius and diameter (Take $\pi$ = $\frac{22}{7}$ ).
[2 marks]

Answer 1

Circumference of the circle, C = 2$\pi r$ units
The circumference of the given circle = 132 m
$\frac{C}{2\pi }=r$
$r=\frac{132}{2\times \frac{22}{7}}$
$=\frac{132}{2}\times \frac{22}{7}$
= 21 cm
[1 mark]
$d=2r$
$=2\times 21$
$=42m$
[1 mark]