Answer:
Explanation:
assume the coin is circular.
i think radius=2.0 cm
∵ 20 cm is too big for a coin.
i have calculated the area of both the surfaces.
area =2×πr²=2×π×2.0²=8 π=8×3.14=25.12 cm²
if only one surface then area=π×2²=4π≈12.57 cm²
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