A horizontal Venturimeter with 10 cm throat diameter is installed in a pipe having diameter 20 cm. The fluid flowing in the pipe is having specific gravity of 0.7. Determine the deflection of oil mercury gauge, if the discharge of the oil is 60 L/sec. Assume coefficient of discharge is equal to 1. If the deflection of mercury gauge is 0.2cm, find the coefficient of discharge of the Venturimeter?