Question

If the diameter of a circle changes from 6 cm to 12 cm, how will the circumference change?
A) multiplies by 1/2
B) multiplies by 2
C) increases by 6
D) decreases by 6

Answer 1

B) option is correct option

Answer 2

r= 6

Circumference= 2πr= 12 π

r = 12

Circumference= 2πr = 24 π r

So option (b) is correct