In a Vernier callipers having 10 VSD, the Vernier constant is 0.1 mm. When the jaws are closed, zero of Vernier lies to the left of zero of main and 7th VSD coincides with a main scale division. When a cylinder is placed between the jaws of main scale reading was 7.7 cm and Vernier scale read 8 divisions. On the bases of above information answer the following question.