Question

Find the perimeter of a circle whose area is 616 sq. cm.​

Answer 1

hey mate!:)

Answer:

88cm

Step-by-step explanation:

Given: 616 sq cm.

To Find: Its circumference

Solution: The area of a circle= πr2

=> 616 = πr2

=> r2 = $\begin{gathered} \frac{616}{\pi} \\ \end{gathered}$

=> r2 = 616/22×7

=> therefore= π = 22/7

=> r2 = 28×7

=> r = √(28×7)= 14 cm

=> Circumference of a circle 2πr

=> 2 × 22/ 7 × 14

=> Circumference of circle = 88cm

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Answer 2

Answer:

88 cm

Step-by-step explanation:

We know that,

Area of a circle is πr² = 616 cm²

We can find the value of r,

r²= 616×7/22 = 196 cm

r = √196 cm = 14 cm

perimeter or circumference of a circle is 2πr

=> 2 × 22/7 × 14

=> 4 × 22 = 88 cm