Two plates are jointed as shown in the Figure. The maximum tensile and shear stresses are 70 N/mm2 and 56 N/mm2 respectively. The plate is 70 mm wide and 12.5 mm thick. What will be value of 
if the total load carried by the joint is 85 kN
(a) 126.39 mm (b) 84.25 mm
(c) 70.00 mm (d)42.125 mm