The pitch of a screw gauge is a mm and there are 100 division on the circular scale.
Channel: Doubtnut
Date: 26/07/2020

The pitch of a screw gauge is a mm and there are 100 division on the circular scale. While measuring the diameter of a wire, the linear scale reads 1mm  and 47th division on circular scale coincides with the reference line. The length of the wire is 5.6 cm. Find the curved surface area `(in cm^2)` of the wire in proper significant figures.