A closed tank has an orifice $0.025m$ diameter in one of its vertical sides.The tank contains oil to a depth of 0.61m above the centre of the orifice and the pressure in the air space above oil is maintained at $13780N/m^2$ above atmospheric.What is the discharge from the orifile.(Coefficient of discharge of the orifice is 0.61 relative density of oil is 0.9)

Question

$\begin{array}{1 1}(A)\;0.0018m^3/s\\(B)\;0.00195m^3/s\\(C)\;0.012m^3/s\\(D)\;0.0013m^3/s\end{array} $