Question

answer for the first one is 0.005 and for the second one is 1.76​

Answer 1

1MSD=1mm

LC=1MSD/no. of vernier divisions

LC=1/20=0.05mm=0.005cm

MSR=35×0.1cm=3.5cm

VC=4

diameter=MSR+VC×LC

=3.5+4×0.005=3.52cm

radius=3.52cm /2=1.76cm

Answer 2

Hey there!

Given,

Value of 1 main scale division = 1 mm

No.of divisions on vernier scale = 20

i) L.C = Value of 1 main scale div. / Total no.of divisions on vernier scale

         = 1/20 mm = 0.05 mm = 0.005 cm

ii) Main scale reading = 35 division = 35 mm = 3.5 cm

   Value of vernier scale reading = 4 * L.C

                                                       = 4 * 0.005

                                                       = 0.02 cm

Diameter of cylinder = 3.5 + 0.02 cm = 3.52 cm                                  

We know,

Radius  = diameter / 2 = 3.52 / 2 = 1.76 cm

Hope It Helps You!