The discharge through a small rectangular orifice is given by:where,Cd = Coefficient of discharge for the orifice,a = cross-sectional area of the orifice,h = height of the liquid above the centre of the orifice.

\(Q = \frac{2}{3}{C_d} \times a \times h\)

\(Q = {C_d} \times a \times \sqrt {2gh} \)

\(Q = \frac{{{C_d} \times a}}{{\sqrt {2gh} }}\)

\(Q = \frac{{3{C_d} \times a}}{{\sqrt {2gh} }}\)

The discharge through a small rectangular orifice is given by:where,Cd

1.	The discharge through a small rectangular orifice is given by:where,Cd = Coefficient of discharge for the orifice,a = cross-sectional area of the orifice,h = height of the liquid above the centre of the orifice.
A.	\(Q = {C_d} \times a \times \sqrt {2gh} \)
B.	\(Q = \frac{2}{3}{C_d} \times a \times h\)
C.	\(Q = \frac{{{C_d} \times a}}{{\sqrt {2gh} }}\)
D.	\(Q = \frac{{3{C_d} \times a}}{{\sqrt {2gh} }}\)
Answer» B. \(Q = \frac{2}{3}{C_d} \times a \times h\)