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+clc
+clear
+//Input data
+d=10^-3;//The diameter of a steel wire in m
+t=20;//The difference in the temperature in degree centigrade 
+y=2*10^11;//The youngs modulus of a steel wire in newtons/m^2
+a=12*10^-6;//The coefficient of linear expansion of steel wire in per degree centigrade
+pi=(22/7);//Mathematical constant value
+
+//calculations
+A=(pi*d^2)/4;//The cross sectional area of the steel wire in m^2
+F=(y*a*t*A)/(9.8);//Force required to maintain the original length in kg wt
+
+//output
+printf('Force required to maintain the original length is %3.3f kg wt ',F)