1 由底面周长得半径为4,面积为50.24 侧面积为25.12*8=200.96
圆柱表面积=50.24*2+200.96=301.44
2 增加了六个圆的面积=4*3.14*6=75.36
3 圆周长=2*3.14*0.4=2.512 前进米数=2.512*20=50.24
面积=50.24*1.6=80.384
1、求下圆柱的表面积.底面周长是25.12厘米,高是8厘米.还有,看下面↓
1、求下圆柱的表面积.底面周长是25.12厘米,高是8厘米.还有,看下面↓
一根长2米,底面直径是4分米的圆柱形木材,把它锯成同样长的4段,表面积比原来增加了多少平方分米?
压路机前轮是圆柱状的,轮宽1.6米,直径0.8米.车轮每分钟滚动20周,每分钟前进多少米?每分钟压路面积是多少平方米?
一根长2米,底面直径是4分米的圆柱形木材,把它锯成同样长的4段,表面积比原来增加了多少平方分米?
压路机前轮是圆柱状的,轮宽1.6米,直径0.8米.车轮每分钟滚动20周,每分钟前进多少米?每分钟压路面积是多少平方米?
数学人气:579 ℃时间:2019-08-20 23:07:08
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