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底面圓的半徑:12.56÷3.14÷2=2釐米 所以圓柱的體積:3.14*2²;*6=75.36立方釐米 圓錐的體積:3.14*2²;*6*1/3=25.12立方釐米 所以削去的體積是:75.36-25.12=50.24
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