Question:-
The given figure (all dimensions are in mm) shows an I-section of the beam

The shear stress at point P (very close to the bottom of the flange) is 12 MPa. The stress at point Q in the web (very close to the flange) is
Option (A)
indeterminable due to incomplete data
Option (B)
60 MPa
Option(C)
18 MPa
Option(D)
12 MPa
Correct Option:
(B)
Question Solution:

tA / tB = t/B
Þ 12 / tB = 20/100 Þ tB = 60 MPa.
question-answer-faq-9345