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+clear
+//
+//Given
+//Variable declaration
+P=300e3 //Power transmitted in W
+N=80 //speed of the shaft in r.p.m
+tau=60 //Maximum shear stress in N/sq.mm
+
+//Calculation
+T=P*60/(%pi*2*N)*1e3 //Mean Torque transmitted in Nmm
+Tmax=1.4*T //Maximum Torque transmitted in Nmm
+D=((16*Tmax/(%pi*tau))**(1/3)) //Suitable diameter of the shaft in mm
+
+Do=(((Tmax*16)/(%pi*tau*(1-0.6**4)))**(1/3)) //External diameter of hollow shaft in mm
+
+Di=0.6*Do //Internal diameter of hollow shaft in mm
+
+//Result
+printf("\n External diameter of hollow shaft = %d mm",Do)
+
+printf("\n Internal diameter of hollow shaft = %d mm",Di)
+