clc
//initialisation of variables
g=20//ft
k=10^-1//cm/sec
g1=3.28*10^-3//fps
w=2//ft
w1=30//ft
//CALCULATIONS
Q=(1/2)*(g1)*[(g^2)-(2^2)]/(w1)//cfs
//RESULTS
printf('the flow into a foot of gallery=% f cfs',Q)