Two rods A and B of equal free lengths hang vertically from ceiling  60 cm apart and at bottom attached to a light horizontal bar. The bar remain in horizontal position when carry a load of 5000 kg at a distance 20 cm from rod A. If the stress in rod B is 50 N/mm2, find the stress in A (in N/mm2) up to two decimal places. Take Young's moduli are YB=9×1010 N/m2,YA=2×1011 N/m2 and g=10 m/s2.