QUESTION IMAGE
Question
a cone has a volume of 28.26 cubic centimeters and a radius of 3 centimeters. what is its height?
round your answer to the nearest hundredth.
h ≈ centimeters
Step1: 写出圆锥体积公式
圆锥体积公式为\(V=\frac{1}{3}\pi r^{2}h\),其中\(V\)是体积,\(r\)是半径,\(h\)是高。
Step2: 代入已知值求解\(h\)
已知\(V = 28.26\)立方厘米,\(r = 3\)厘米,\(\pi\)取\(3.14\),将其代入公式\(28.26=\frac{1}{3}\times3.14\times3^{2}\times h\)。
先计算\(\frac{1}{3}\times3.14\times3^{2}\):
\(\frac{1}{3}\times3.14\times3^{2}=\frac{1}{3}\times3.14\times9 = 9.42\)。
则\(28.26 = 9.42h\),解得\(h=\frac{28.26}{9.42}=3\)。
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