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+//CHAPTER 2 ILLUSTRATION 3 PAGE NO:58
+//TITLE:TRANSMISSION OF MOTION AND POWER BY BELTS AND PULLEYS
+clc
+clear
+//==============================================================================
+//input
+d1=30//diameter of 1st shaft in cm
+d2=50//diameter 2nd shaft in cm
+pi=3.141
+c=500//centre distance between the shafts in cm
+//==============================================================================
+//calculation
+L1=((d1+d2)*pi/2)+(2*c)+((d1+d2)^2)/(4*c)//lenth of cross belt
+L2=((d1+d2)*pi/2)+(2*c)+((d1-d2)^2)/(4*c)//lenth of open belt
+r=L1-L2//remedy
+//==============================================================================
+//OUTPUT
+printf('length of cross belt is %3.3fcm \n length of open belt is %3.3f cm \n the length of the belt to be shortened is %3.0f cm',L1,L2,r)