# Q.11 If the principal stresses in a plane stre...

Q.11 If the principal stresses in a plane stress problem, are $\sigma _1$ = 100MPa, $\sigma _2$ = 40MPa , the magnitude of the maximum shear stress (in MPa) will be

(A) 60

(B) 50

(C) 30

(D) 20

Hint: