Question 131619
SOLUTION -

GIVEN 
       VOLUME OF CYLINDER = {{{(722*3.14)mm^3}}}
       HEIGHT OF CYLINDER = 8mm
       TO FIND OUT THE RADIUS

  Let the radius be r
  volume of a cylinder = {{{3.14*r^2*h}}}
  {{{722*3.14}}} = {{{3.14*r^2*8}}}
  {{{(722*3.14)/(3.14*8)}}} = {{{r^2}}}
    {{{722/8}}}={{{r^2}}}
      {{{361/4}}}={{{r^2}}}
      {{{sqrt(361/4)}}}= r
         {{{19/4}}}=  r

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