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diff --git a/3257/CH6/EX6.6/Ex6_6.sce b/3257/CH6/EX6.6/Ex6_6.sce
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+// Force in hot extrusion
+clc
+D = 150 // initial diameter in mm
+H = 300 // height in mm
+v = 330 // velocity in m/sec
+d = 75 // final diameter in mm
+mu = 0.1 // frictional coefficient
+C = 240 // in MPa
+m = 0.06 // constant
+a = 0.8 // from table
+b = 1.5 // from table
+printf("\n Example 6.6")
+R = D^2/d^2 // its calculated value in book is 2, while in actual its 4 
+epsilon = 6*(H*1e-3)*log(R)/(D*1e-3)
+sigma = C*epsilon^m
+Y_bar = sigma // assumption
+p = Y_bar*(a+b*log(R))
+F = p*1e6*%pi*(D*1e-3)^2/4
+printf("\n Force required for rolling is %.1e N.",F)
+// Answer in book is 8.8e6 N. It is because of wrong calculation of value of R
+
diff --git a/3257/CH6/EX6.6/Ex6_6.txt b/3257/CH6/EX6.6/Ex6_6.txt
new file mode 100755
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+ 
+ Example 6.6
+ Force required for rolling is 1.5e+07 N. 
+\ No newline at end of file