1 MSD = 1.0 mm and No. of vernier divisions = 10 Least count of vernier callipers, C =
1MSD
N
=
1
10
= 0.1 mm = 0.01 cm The instrument has positive error, e = NC = 7(0.01) = 0.07 cm Zero correction = -0.07 cm MSR = 3.1 cm vernier coincidence = 4(0.01) = 0.04cm Length of the cylinder = MSR + Vernier coincidence + zero correction = 3.1 + 0.04 – 0.07 = 3.07 cm