Question

if are of circle=172.1 then find it's circumference=?​

Answer 1

Answer:

46.472 units

Step-by-step explanation:

area of circle = pi r^2

172.1 = 3.14 x r^2

r^2 = 1721/10 x 100/314

r^2 = 17210/314

r = √(17210/314)

circumference = 2 pi r

                        = 2 x 314/100 x √(17210/314)

                        = 314/50 x 7.4

                         = 46.472 units

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