Two planes AB and BC which are at right angles carry shear stresses of intensity 26 N/mm while the plane AB carries a tensile stress of 60 N/mm (tensile) as shown in figure below. Find the normal and shear stresses on plane AC inclined at 25 to the plane AB. C 26 N/mm B 26 N/mm 25 60 N/mm 69.2 N/mm and 6.26 N/mm (b) 31.9 N/mm and 22.98 N/mm2 (c) 69.6 N/mm and - 0.63 N/mm (d) 69.6 N/mm and 6.26 N/mm