//problem 4.5
b=0.75
H1=2.25
H2=2.5
H=0.5
g=9.81
Cd=0.62
Q=Cd*b*(H2-H1)*((2*g*H)^0.5)
Q1=Q*1000
disp(Q1,"discherge through the orifice in litres/sec")