30. Solving a chemistry problem

162. A sample of steel weighing m (g) was dissolved in a flask with a capacity of 50.0 ml. Aliquots of 20.0 mL were taken into two 50.0 mL volumetric flasks. A solution containing 0.001000 g of titanium was added to one flask. Hydrogen peroxide was added to both flasks and the solutions were brought to the mark. Calculate the mass fraction (%) of titanium in steel if the following optical densities Ax and Ax+st were obtained during photometry of solutions:
Option 162
m, g 0.6000
Ah 0.230
Ah+st 0.465