40立方厘米
高大到原来的2倍,体积扩大到原来的2倍;底面半径扩大到原来的2倍,体积扩大到原来的2^2=4倍;体积一共扩大了8倍;所以320/8=40
一个圆柱的底面半径和高都扩大到原来的2倍,新圆柱的体积是320立方厘米,原来圆柱的体积是多少立方厘米
一个圆柱的底面半径和高都扩大到原来的2倍,新圆柱的体积是320立方厘米,原来圆柱的体积是多少立方厘米
数学人气:586 ℃时间:2020-03-28 12:51:20
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