The circumference of a circle is 31.4 cm. Find the radius and the area of the circle? ( Take pie = 3.14 )
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Answer:
Circumference of the circle = 31.4 cm
2πr = 31.4
∴ r= 31.4 / 2×3.14 = 5 cm
Area of the circle = 7πr square
= 3.14 × 5 × 5 = 78.5 cm square
Hence, the required radius
= 5 cm and area
= 78.5 cm square
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