The diameter of a coin is 4.5 cm. Find its surface area
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Answer:
Surface area of coin is 0.0027 m²
It is given that,
Diameter of a coin is 4.2 cm. The radius of coin is equal to its diameter divided by 2. So, radius of coin, r = 2.1 cm = 0.021 m
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πr²=4.5²=4.5*4.5=20.25
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