सममित बीम खंडों (symmetrical beam sections) में, अधिकतम अपरूपण प्रतिबल (maximum shear stress) कहाँ होता है?

A beam of triangular cross-section is used with its base horizontal. The intensity of maximum shear stress will occur at which location along the depth?

A rectangular cross-section beam of size 300 mm × 500 mm is subjected to a shear force of 20 kN. What is the shear stress at 150 mm above the neutral axis?