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+//Solutions to Problems In applied mechanics
+//A N Gobby
+clear all;
+clc
+//initialisation of variables
+d=7.5//in
+m1=8000//lbf/in^2
+m2=2000//lbf/in^2
+h1=3//in
+d1=2//in
+d4=57//lbf in
+W=2.74//lbf in
+//CALCULATIONS
+P=%pi*d1^4/32//in^4
+M=(m1/1)*P//lbf in
+T=M/(8*(d/d1))//lbf
+A=T/m2//in^2
+B=sqrt((4*A)/%pi)//in
+//RESULTS
+printf('the bolt diameter =% f in',B)