Question

Find the diameter of a circle whose area is 616m2

Answer 1

Area = πr²
616 = π r²
r² = 616/π
r² = 196
r = 14.
d = 2r = 28.

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Answer 2

Hi...

Area of a circle =
$\pi \: r {}^{2}$
616=22/7×r×r

616×7÷22=r×r

196=r^2

So,
$r = \sqrt{196}$
$r = 14$
Diameter =radius ×2
=14×2
=28.

Hope this helps you....

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