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116问答网 > 一个圆柱底面半径是0.5cm，高3.5cm表面积是多少？

一个圆柱底面半径是0.5cm，高3.5cm表面积是多少？

2025-04-04 01:08:28

推荐回答（1个）

回答1：

圆柱的侧面积=底面周长×高
S侧=ch=2×3.14×3.5
=10.99
圆柱的底面积： s= πr² =3.14××0.5 ²
=0.785
圆柱的表面积=圆柱侧面积+两个底面积
= 10.99+0.785 ×2
= 12.56平方厘米
答：表面积是12.56平方厘米

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