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Significant Figures in Sum

The diameter ...

Question

The diameter of a sphere is $3.34 m$ . Calculate its volume with due regard to significant figures.

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Solution

Diameter $d = 3.34 m \Rightarrow r = 1.67 m$
Volume of sphere $= \frac{4}{3} {Π r}^{3} = 19.51 m^{3}$
$\approx 19.5 m^{3}$ [ $3$ significant digits].

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