Question

find the circumference of the circle of radius 3.5 cm

Answer 1

Circumference of circle =
$2\pi \: r$
=2x22/7x3.5=22cm

Answer 2

2 or is the formula to find circumference of a circle apply the formula and get the answer and plz don't just copy the stuff try to calculate urself or u won't increase ur calculating speed which usually is a bad call for students as white giving board exams u guys usually end up quiting some questions due to lack of time and incomprehensibility