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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 (l)=21.7cm and radius (r)=0.46mm=0.046cm[As1mm=0.1cm]

As the volume of wire =volume of cylinder=πr2l[hereh=l]

So, the volume of wire =227x0.0462x21.7

=0.1443cm3

Hence the volume of the wire to correct the significant figure is 0.14cm3


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