A circle its circumference is 75 cm calculate its surface area \pi= (22)/(7 \: ) \: or \: 3.14

Question

A circle its circumference is 75 cm calculate its surface area


`\pi= (22)/(7 \: ) \: or \: 3.14`

Answer 1

Circumference = πD

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Given that the circumference is 75cm, find Diameter:
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πD = 75
D = 75 ÷ 3.14
D = 23,89 cm

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Find Radius:
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Radius = Diameter ÷ 2
Radius = 23.89 ÷ 2
Radius = 11.94 cm

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Find Surface Area:
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Area = πr²
Area = 3.14 x 11.94²
Area = 447.65 cm²

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Answer: 447.65cm²
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