Question

Find the circumference (in cm) of a circle whose diameter is 5.6 m.

Answer 1

Diameter $=5.6m=>$ radius $=2.8m$
Circumference of a circle of radius r $=2\pi r$

Circumference of circle of radius $2.8m=2\pi \times \left(2.8m\right)$

$\Rightarrow 2\times \frac{22}{7}\times 2.8=17.6m$

$\Rightarrow 1760cm$