Question

Find the circumference of a circle whose radius is 15.4 cm.

Answer 1

The radius of the circle $=15.4cm$

we know that

circumference of the circle$=2\pi r$

$=2.\pi \times 15\times 4$

$=2\times \frac{22}{7}\times 15\times 4$

$=96.8cm$

$\therefore$ circumference of the circle $=96.8cm$