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The perimeter of a semicircular whose radius is 3r is

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The perimeter of a semicircular whose radius is 3r is

(A) 3πr + 3r

(B) 3πr + 6r

(C) 3πr + 9r

(D) 3πr

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1 Answer

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Best answer

Correct option is (B) 3πr + 6r

radius = 3r

Perimeter of a Semicircle = πr + 2r

= (π x 3r) + (2 x 3r)

= 3πr + 6r

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