Question

In a screw gauge, 5 complete rotations of the screw cause if to move a linear distance of 0.25 cm. There are 100 circular scale divisions. The thickness of a wire measured by this screw gauge gives a reading of 4 main scale divisions and 30 circular scale divisions. Assuming negligible zero error, the thickness of the wire is :

Answer 1

Answer:

8 main scale division............

Answer 2

Is main scale reading in cm? or mm?