Question

A circular piece of tin has a measured radius of 2.6 cm. what is its circumference

Answer 1

Radius = 2.6cm
Circumference=
$2\pi \: r$
$= 2 \times \frac{22}{7} \times 2.6 \\ = 16.34(approx)$

Answer 2

2*22/7*26/10=16 whole 12 by 35