Question

the diameters of a circular well is4.2m. what is its circumferwnce​

Answer 1

Circumference of a circle = 2πr

d=4.2 m

r=4.2/2

r=2.1 m

circumference=2 x 22/7 x 2.1

= 2 x 22 x 0.3

= 44 x 0.3

=13.2 m

Answer 2

Step-by-step explanation:

circumference of circle 2πr

here diameter= 4.2

then r=2.1

then 2×22/7×2.1= 13.2