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diff --git a/213/CH10/EX10.10/10_10.sce b/213/CH10/EX10.10/10_10.sce
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+//To find ratio of torques and efficiency
+clc
+//Given:
+d=50,p=12.5 //mm
+mu=0.13
+W=25*1000 //N
+//Solution:
+//Calculating the helix angle
+alpha=atan(p/(%pi*d)) //radians
+//Calculating the force required on the screw to raise the load
+phi=atan(mu) //Limiting angle of friction, radians
+P1=W*(alpha+phi) //N
+//Calculating the torque required on the screw to raise the load
+T1=P1*d/2 //N-mm
+//Calculating the force required on the screw to lower the load
+P2=W*tan(phi-alpha) //N
+//Calculating the torque required to lower the load
+T2=P2*d/2 //N
+//Calculating the ratio of the torques required
+r=T1/T2 //Ratio of the torques required, N-mm
+//Calculating the efficiency of the machine
+eta=tan(alpha)/tan(alpha+phi)*100 //%
+//Results:
+printf("\n\n Torque required on the screw to raise the load, T1 = %d N-mm.\n",T1)
+printf(" Ratio of the torque required to raise the load to the torque required to lower the load = %.1f.\n",r)
+printf(" Efficiency of the machine, eta = %.1f %c.\n\n",eta,"%")
+\ No newline at end of file