Question

Thickness of a metallic sheet is measured using a screw gauge and readings are 0.842 cm, 0.865 cm, 0.908 cm, 0.892 cm, 0.837 cm. Calculate the mean value, mean absolute error, relative error and percentage error.
pls tell the correct answer​

Answer 1

Answer:

2.57mm

Explanation:

Main scale reading M.S.R.=2 mm

Coinciding division n=57

Least count of screw gauge L.C.=0.01 mm

Thickness of wire t=M.S.R.+n×L.C.=2+57×0.01=2.57 mm