1 Answer

Dogoku · Answer 1 · 2020-03-13T23:50:08+0000

Answer:

r =
$\sqrt{(A)/(\pi ) }$

r = 17.2 cm

Explanation:

∵ The area of the circle A = πr²

∴ r² = A/π

∴ r = √(A/π)

∵ A = 54 cm²

∵ π = 22/7

∴ r = √(54/(22/7)) = √(54×7/22) = 17.2 cm

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