Question

Find the circumference of the circles with the following radius: (Take π =

22
7 )
(a) 14 cm (b) 28 mm (c) 21 cm

Answer 1

circumfrence of a circle= 2πr

(a)14 cm = 2*22/7*14

= 88cm

(b)28cm = 2*22/7*28

=176cm

(c)21cm = 2*22/7*21

132cm