Question

find the circumference
of a circle of radius 7 cm

Answer 1

Circumfarance of circle=2×(22/7)×7=44cm.

Answer 2

For the given circle,
r = 7cm
therefore,
circumference = 2TTr
                       = 2 * 22/7 * 7
                       = 2 * 22
                       = 44   
thus circumference of given circle is 44cm