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the volume of this cone is 461.58 cubic yards. what is the radius of th…

Question

the volume of this cone is 461.58 cubic yards. what is the radius of this cone?
round your answer to the nearest hundredth.
9 yd
r ≈ yards

Explanation:

Step1: 写出圆锥体积公式

圆锥体积公式为 \( V=\frac{1}{3}\pi r^{2}h\),已知 \( V = 461.58\) 立方码,\( h=9\) 码,\(\pi\) 取 \( 3.14\)。

Step2: 代入已知值求解 \(r^{2}\)

将 \(V = 461.58\),\(h = 9\),\(\pi=3.14\) 代入公式 \(461.58=\frac{1}{3}\times3.14\times r^{2}\times9\)。
先计算 \(\frac{1}{3}\times3.14\times9 = 9.42\),则方程变为 \(461.58 = 9.42r^{2}\)。
两边同时除以 \(9.42\),得到 \(r^{2}=\frac{461.58}{9.42}=49\)。

Step3: 求解 \(r\)

因为 \(r^{2}=49\),所以 \(r=\sqrt{49}= 7\)(\(r>0\),半径不能为负)。

Answer:

\(7.00\)