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+// A Textbook of Fluid Mecahnics and Hydraulic Machines - By R K Bansal
+// Chapter 1-Properties of Fluid
+// Problem 1.13
+
+
+//Given Data Set in the Problem
+y=poly(0,"y")
+u=3*y/4-y^2
+visc=8.5/10
+
+//Calculations
+du_dy=(horner(derivat(u),0.15))
+
+ss=visc*du_dy
+mprintf("The shear stress at y=0.15 m is %f N/m^2 \n",ss)