AIEEE 2008 Solved Paper

Two full turns of the circular scale of a screw gauge cover a distance of 1‌mm on its main scale. The total number of divisions on the circular scale is 50 . Further, it is found that the screw gauge has a zero error of −0.03‌mm while measuring the diameter of a thin wire, a student notes the main scale reading of 3‌mm and the number of circular scale divisions in line with the main scale as 35 . The diameter of the wire is