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+// problem 11.1
+P=8820*1000
+N=600/60
+H=500
+Cv=0.97
+Cu=0.46
+no=0.85
+w=9810
+g=9.81
+Q=P/(no*w*H)
+V1=Cv*((2*g*H)^0.5)
+u=Cu*V1
+D=u/(3.142*N)
+d=D/15
+a=3.142*d*d/4
+n=Q/(a*V1)
+n1=round(n+1)
+disp(n1,d*100,D,Q,"discharge in m3/sec,wheel diameter in m, jet diameter in cm, number os jets ")