QUESTION IMAGE
Question
the volume of this cylinder is 2,279.64 cubic inches. what is the radius? round your answer to the nearest hundredth. 6 in ( r approx ) inches
Step1: 写出圆柱体积公式
圆柱体积公式为 \(V=\pi r^{2}h\),其中 \(V = 2279.64\) 立方英寸,\(h = 6\) 英寸,\(\pi\) 取 \(3.14\)。
Step2: 代入已知值求解 \(r^{2}\)
将 \(V = 2279.64\),\(h = 6\),\(\pi = 3.14\) 代入公式 \(V=\pi r^{2}h\),得到 \(2279.64=3.14\times r^{2}\times6\)。
先计算 \(3.14\times6 = 18.84\),则 \(r^{2}=\frac{2279.64}{18.84}\)。
\(r^{2}=121\)。
Step3: 求解 \(r\)
因为 \(r^{2}=121\),所以 \(r=\sqrt{121}\)(\(r>0\),半径为正数),\(r = 11.00\)。
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\(11.00\)