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diff --git a/3434/CH7/EX7.2/Ex7_2.sce b/3434/CH7/EX7.2/Ex7_2.sce
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+// given data
+clear 
+clc
+
+u0=20.0 // wind speed in m/s
+T=273+27.0 // temp in kelvin
+P=1.01325e5 // pressure in Pa
+R=287.0 // gas constant
+r=80/2.0 // radius of rotor in m
+w=2*%pi*40/60.0 // rotor speed in rad/s
+A=%pi*r**2 // area of rotor in m^2
+
+// soln:
+rho=P/(R*T) // density in Kg/m^3
+a=1/3.0 // condition for maximum output
+Cpmax=4*a*(1-a)**2 // Power Coefficient
+Lambda=r*w/u0 //tip speed ratio
+
+Po=(A*rho*u0**3)/2000000 // Total Power in Wind in W
+
+Tm=Po*r/u0 // Torque in N
+
+Ctmax=Cpmax/Lambda // torque coefficient 
+
+Tshmax=Tm*Ctmax // torque at shaft
+
+printf("The torque at shaft for maximum output is %0.2f N",Tshmax)