Question

1. Find the circumference of the circle whose :
(a) diameter = 21 cm
(b) diameter = 6.3 cm​

Answer 1

Answer:

(a) circumference of circle= 2πr=2×π×(21÷2) as radius of circle= d÷2=21÷2or it can be 2×22/7×21/2=66cm

(B) it can be 2πr. or. 2×22/7×6.3/2=19.2cm

Answer 2

Answer:

a=66

b=19.8

Step-by-step explanation:

πd=cf

22÷7×21