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底面半徑=25.12÷3.14÷2=4(釐米) 底面積=3.14×4²;=50.24(平方釐米) 側面積=25.12×10=251.2(平方釐米) 表面積=251.2+50.24×2=351.68(平方釐米) 體積=50.24×10=502.4(立方釐米)
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