I think the solutions of some questions asked in TG4 are wrong............

those are (1) the question asked on stress concentration factor (carrying 1 mark).....the solution is wrong the formula will be 2*a/b. check formula from v b bhandari,

(2) the direction of flow from which point to which point(carrying 1 mark)..........the solution is probably wrong.

(3) the solution of integration of function ((e^x)+(e^-x))/((e^x)-(e^-x)) (carrying 2 marks)..........will be none of these but the solution is given log((e^x)+(e^-x))....

!!!NEED A QUICK REPLY PLEASE!!!!!