Question

# A Thin Wire Has a Length of $21.7cm$ and Radius $0.46mm$. Calculate the Volume of the Wire To Correct Significant Figure.

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Solution

## Given,Length of wire $\left(l\right)=21.7cm$ and radius $\left(r\right)=0.46mm=0.046cm\left[As1mm=0.1cm\right]$As the volume of wire $=$volume of cylinder$={\mathrm{\pi r}}^{2}\mathrm{l}\left[\mathrm{here}\mathrm{h}=\mathrm{l}\right]$ So, the volume of wire $=\frac{22}{7}x{\left(0.046\right)}^{2}x21.7$ $=0.1443c{m}^{3}$Hence the volume of the wire to correct the significant figure is $0.14c{m}^{3}$

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