Question

The diameter of a circle is 5.6 cm. Find its circumference.

Answer 1

Diameter = 5.6 cm
Radius = $\frac{\mathrm{diamete}r}{2}=\frac{5.6}{2}=2.8\mathrm{cm}$
Circumference = $2\mathrm{\pi }r=2\times \frac{22}{7}\times 2.8=17.6\mathrm{cm}$
Thus, the circumference of the circle is 17.6 cm.