In a screw gauge, the zero of the circular scale lies 3 divisions above the horizontal pitch line when their metallic studs are brought in contact.…

In a screw gauge, the zero of the circular scale lies $\displaystyle 3$ divisions above the horizontal pitch line when their metallic studs are brought in contact. Using this instrument thickness of a sheet is measured. If pitch scale reading is $\displaystyle 1$ mm and the circular scale reading is $\displaystyle 51$ then the correct thickness of the sheet is $\displaystyle \_\_\_\_$ mm. [Assume least count is $\displaystyle 0.01$ mm ]