If the circumference of a circle is 78.5dm, find its area
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Step-by-step explanation:
Circumstance = 2πr
=> 2πr = 78.5
=> 2 × 3.14 × r = 78.5
=> 6.28r = 78.5
=> r = 78.5/6.28
=> r = 12.5
Area of a circle = πr²
=> 3.14 × (1.25)²
=> 490.625 dm²
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