The pitch of a screw gauge having 50 division on its circular scale is `1mm`. When the two jaws of the screw gauge are in contact with each other, the zero of the circular scale lies 6 division below the lineof graduation. When a wire is placed between the jaws, 3 linear scale divisioins are clearly visible while `31^(th)` division on the circular scale coincide with the reference line. The diameter of the wire is:

Options

A. 3.62mm
B. 3.50mm
C. 3.55mm
D. 3.74mm

Answer

B

Explanation

Diameter `=(3)(1)+(1/50)(31-6)=3.50`mm