If the amount invested by Company B in 2004 is Rs. 12 lakh and income of 2004 is equal to the investment in 2005, what is the amount of profit earned in 2005 by Company B?

$$\eqalign{ & \text{Investment of B in 2004 = 12 lakh} \cr & \text{Income of B in 2004} \cr & =\text{Rs.}\left(\frac{155}{100}\times12\text{ lakh}\right) \cr & = \text{Rs. 18.6 lakh} \cr & \text{Profit earned in 2005} \cr & =\text{Rs.}\left(\frac{55}{100}\times18.6\text{ lakh}\right) \cr & =\text{Rs.}\left(\frac{11}{10}\times9.3 \text{ lakh}\right) \cr & =\text{Rs. 10.23 lakh} \cr} $$