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1. 计算下面图形的体积。
$V_{圆柱}=\pi r^{2}h$
$=3.14\times\square\times\square$
$=$
$V_{圆柱}=\pi(d\div2)^{2}h$
$=3.14\times(\square\div2)^{2}\times\square$
$=$
$r = C\div\pi\div2$ $V_{圆柱}=\pi r^{2}h$
$=$ $=$
$=$ $=$
$S_{底}=\pi(R^{2}-r^{2})$ $V_{圆柱}=Sh$
$=$ $=$
$=$ $=$
$V_{圆柱}=\pi r^{2}h$
$=3.14\times\square\times\square$
$=$
$V_{圆柱}=\pi(d\div2)^{2}h$
$=3.14\times(\square\div2)^{2}\times\square$
$=$
$r = C\div\pi\div2$ $V_{圆柱}=\pi r^{2}h$
$=$ $=$
$=$ $=$
$S_{底}=\pi(R^{2}-r^{2})$ $V_{圆柱}=Sh$
$=$ $=$
$=$ $=$
答案：
1²@@5@@15.7(cm³)@@6@@8@@3.14×9×8 = 226.08(cm³)@@18.84÷3.14÷2 = 3(dm)@@3.14×3²×4 = 113.04(dm³)@@3.14×(0.5² - 0.4²) = 3.14×0.09 = 0.2826(m²)@@0.2826×2 = 0.5652(m³)
2. 计算下面圆柱的高。
$h = V\div S$
$=$
$h = V\div(\pi r^{2})$
$=$
$h = V\div S$
$=$
$h = V\div(\pi r^{2})$
$=$
答案：
320÷8 = 40(dm)@@282.6÷(3.14×3²) = 10(cm)
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