Question

A student used the measuring instrument below to measure the thickness of a cylindrical wire. If the wire is 10cm long, determine the volume of the wire.  

Answer 1

Reading=(4.5+0.45)mm
         D=4.95mm
          r=2.475mm
           =0.2475cm
          v=πr²L
           =3.142 × 0.2475² × 10
           =1.925cm³