计算下面各圆柱的表面积(1)圆柱的高是16cm,底面直径是12cm(2)圆柱的高是20cm,底面直径是5cm(3)圆柱的高是15cm,底面直径是18cm
问题描述:
计算下面各圆柱的表面积
(1)圆柱的高是16cm,底面直径是12cm
(2)圆柱的高是20cm,底面直径是5cm
(3)圆柱的高是15cm,底面直径是18cm
答
==3.14X6X6X2+3.14X12X16
2==3.14X2.5X2.5X2+3.14X5X20
3==3.14X9X9X2+3.14X18X15
答
1==3.14X6X6X2+3.14X12X16
2==3.14X2.5X2.5X2+3.14X5X20
3==3.14X9X9X2+3.14X18X15