Question

Diameter of circle with circumference 6cm

Answer 1

circumference =2πr = 6

=2 X 22/7 X r = 6

=44/7 r = 6

=r = 6 X 7/44

=r = 21/22

= r = 0.95 cm

as r (radius) = diameter/2

so,  

diameter = 2 X radius

= 2 X 0.95

=1.9cm is the diameter