Question

If the area of a circle is 78.5sq. cm.
Find ets circumference?​

Answer 1

Answer:

Circumference of circle is 31.4 cm

Step-by-step explanation:

Given,

Area of circle = 78.5 cm²

or, πr² = 78.5

or, 3.14*r² = 78.5

or, r² = 78.5 / 3.14

or, r² = 25

or, r = √25

or, r = 5 cm

Now, Circumference of circle can be given as:

Circumference = 2πr

or, Circumference = 2*3.14*5

or, Circumference = 31.4 cm

Therefore, Circumference of circle is 31.4 cm