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diff --git a/278/CH14/EX14.8/ex_14_8.sce b/278/CH14/EX14.8/ex_14_8.sce
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+//determine dia of the shaft
+clc
+//solution
+//given
+//ref fig 14.4
+D=1500//mm
+R=750//mm
+T1=5400//N
+T2=1800//N
+L=400//mm
+t=42//N/mm^2
+T=(T1-T2)*R//N-mm
+W=T1+T2//N
+M=W*L//N-mm
+//let d be dia of shaft
+Te=sqrt(M^2 + T^2)//N-mm
+//Te=(%pi/16)*t*d^3
+d=(Te/8.25)^(1/3)//mm
+printf("the dia of shaft is,%f mm",d)