Consider the diameter of a spherical object being measured with the help of a Vernier callipers. Suppose its 10 Vernier Scale Divisions (V S D) are equal to its 9 Main Scale Divisions (M S D). The least division in the M S is 0.1 cm and the zero of V S is at x = 0.1 cm when the jaws of Vernier callipers are closed. If the main scale reading of the diameter is M = 5 cm and the number of coinciding vernier division is 8, the measured diameter after zero error correction is