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每個半圓柱的體積為25.12立方釐米,原來圓柱的體積是25.12*2=50.24立方釐米切面是個正方形,地面直徑與高相等圓柱的體積是pai*r^2*h=50.242r=hr=2釐米h=4釐米半個圓柱的表面積是(2pai*r*h+2pai*r^2)/2+2r* h=8pai+4pai+…
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