The discharge through a large rectangular orifice is given by (where H1 = Height of the liquid above
the top of the orifice, H2 = Height of the liquid above the bottom of the orifice, b = Breadth of the
orifice, and Cd = Coefficient of discharge)
(A) Q = (2/3) Cd × b × (2g) × (H2 - H1)
(B) Q = (2/3) Cd × b × (2g) × (H2
1/2 - H1
1/2)
(C) Q = (2/3) Cd × b × (2g) × (H2
3/2 - H1
3/2)
(D) Q = (2/3) Cd × b × (2g) × (H2
2
- H1
2
)
the top of the orifice, H2 = Height of the liquid above the bottom of the orifice, b = Breadth of the
orifice, and Cd = Coefficient of discharge)
(A) Q = (2/3) Cd × b × (2g) × (H2 - H1)
(B) Q = (2/3) Cd × b × (2g) × (H2
1/2 - H1
1/2)
(C) Q = (2/3) Cd × b × (2g) × (H2
3/2 - H1
3/2)
(D) Q = (2/3) Cd × b × (2g) × (H2
2
- H1
2
)