The discharge through a large rectangular orifice is given by (where H 1 = Height of the liquid above the top of the orifice, H 2 = Height of the liquid above the bottom of the orifice, b = Breadth of the orifice, and C d = Coefficient of discharge)

• A. Q = C d x b 2 g ( H 2 - H 1 )
• B. Q = C d x b 2 g ( H 2 1/2 - H 1 1/2 )
• C. Q = C d x b 2 g ( H 2 3/2 - H 1 3/2 )
• D. Q = C d x b 2 g ( H 2 2 - H 1 2 )