1. The problem statement, all variables and given/known data In the figure are the dimensions, and the question is the time in which the take will empty Area of orifice 1 cm2 Discharge coefficient: 0.447 Gravity 10 m/s2 2. Relevant equations Area of surface = 8x = 8 (2 H) = 16H 3. The attempt at a solution. The red lines are the tank. And I prolongate the lines of the section to find the relation between "H" and X.