Question

find the sum of the circumference of two circles whose diameter are 42 cm and 7 cm respectively​

Answer 1

Step-by-step explanation:

d=42cm,c=?,

c=πd

c=22/7×42

c=22×6

c=132cm

d=7cm,c=?

c=πd

c=22/7×7

c=22cm

sum of circumference of two circles are

132+22=154cm

Answer 2

Answer:

24.5cm

Step-by-step explanation:

diameter 1 = 42÷2 =21cm

diameter 2 = 7÷2 =3.5cm

sum of the diameters =21 + 3.5cm

=24.5cm