Question

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

Answer 1

Given,

Length of wire $\left(l\right)=21.7cm$ and radius $\left(r\right)=0.46mm=0.046cm[As1mm=0.1cm]$

As the volume of wire $=$volume of cylinder$={\mathrm{\pi r}}^2\mathrm{l}[\mathrm{here}\mathrm{h}=\mathrm{l}]$

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 $0.14c{m}^3$