QUESTION IMAGE
Question
what is the volume of this sphere?
round your answer to the nearest hundredth.
40 cm
cubic centimeters
Step1: 求半径
已知直径\(d = 40\mathrm{cm}\),根据半径\(r=\frac{d}{2}\),可得\(r=\frac{40}{2}=20\mathrm{cm}\)。
Step2: 代入体积公式
球的体积公式为\(V = \frac{4}{3}\pi r^{3}\),将\(r = 20\)代入公式,得到\(V=\frac{4}{3}\times\pi\times20^{3}\)。
先计算\(20^{3}=20\times20\times20 = 8000\),则\(V=\frac{4}{3}\times\pi\times8000=\frac{32000\pi}{3}\)。
取\(\pi\approx3.14159\),则\(V=\frac{32000\times3.14159}{3}\)。
\(32000\times3.14159 = 100530.88\),\(V=\frac{100530.88}{3}\approx33510.29\)(\(\mathrm{cm}^{3}\))。
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\(33510.29\)