What is the perimeter of a semi-circular disc with radius 27 units?

138.78

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137.36

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137.78

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139.12

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Solution

The correct option is A 138.78
Perimeter of a semi-circle = $π r + 2 r$
= 3.14 x 27 + 54
= 138.78

Hence, perimeter of the semi-circular disc is 138.78 units.

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What is the perimeter of a semi-circular disc with radius 27 units?

The correct option is A 138.78Perimeter of a semi-circle = πr+2r = 3.14 x 27 + 54 = 138.78 Hence, perimeter of the semi-circular disc is 138.78 units.

The correct option is A 138.78
Perimeter of a semi-circle = $π r + 2 r$
= 3.14 x 27 + 54
= 138.78

Hence, perimeter of the semi-circular disc is 138.78 units.