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diff --git a/2159/CH7/EX7.10/710.sce b/2159/CH7/EX7.10/710.sce
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+// problem 7.10
+D=2.4
+d=1.5
+i=1/1500
+N=0.02
+a=(d-(D/2))/(D/2)
+z=acos(a)
+z1=3.142-z
+P=D*z1
+A=D*D*0.25*(z1-(sin(2*z1)/2))
+m=A/P
+Q=(A*(m^0.6666)*(i^0.5))/N
+disp(Q*1000,"the discharge through the sewer in litres/sec")
+