15 mL of aqueous solution of $\mathrm{Fe}^{2+}$ in acidic medium completely reacted with 20 mL of 0.03 M aqueous $\mathrm{Cr}_2 \mathrm{O}_7^{2-}$. The molarity of the $\mathrm{Fe}^{2+}$ solution is $\_\_\_\_$ $\times 10^{-2} \mathrm{M}$ (Round off to the Nearest Integer).
