8÷2=4厘米4÷2=2厘米
3.14*(4的平方-2的平方)*200
=3.14*12*200
=37.68*200
=7536立方厘米
一根长2米的圆柱形空心钢管,外直径是8厘米,内直径是4厘米,这跟钢管的体积是多少?
一根长2米的圆柱形空心钢管,外直径是8厘米,内直径是4厘米,这跟钢管的体积是多少?
数学人气:891 ℃时间:2019-10-10 04:43:10
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