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the volume of this cone is 392.5 cubic yards. what is the height of thi…

Question

the volume of this cone is 392.5 cubic yards. what is the height of this cone?
round your answer to the nearest hundredth.
5 yd
h≈ 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 \( V = 392.5\) 立方码,\( r = 5\) 码,\(\pi\) 取 \( 3.14\)。

Step2: 代入数据求解\(h\)

将 \( V = 392.5\),\( r = 5\),\(\pi = 3.14\) 代入公式 \( 392.5=\frac{1}{3}\times3.14\times5^{2}\times h\)。
先计算 \( 5^{2}=25\),则式子变为 \( 392.5=\frac{1}{3}\times3.14\times25\times h\)。
再计算 \(\frac{1}{3}\times3.14\times25=\frac{78.5}{3}\),式子为 \( 392.5=\frac{78.5}{3}h\)。
两边同时乘以 \( 3\) 得 \( 392.5\times3 = 78.5h\),即 \( 1177.5 = 78.5h\)。
最后 \( h=\frac{1177.5}{78.5}=15.00\)。

Answer:

\(15.00\)