If the investments of Company A in 2007 and 2008 were equal, what is the difference between the profits earned in the two years if the income in 2008 was Rs 24 lakh?

 If the amount invested by Company B in 2004 is Rs I2 lakh and the income of 2004 is equal to the investment in 2005, what is the amount of profit earned in 2005 by Company B?

 If the amount of profit earned by Company A in 2006 was Rs 10.15 lakh, what was the total investment?

 If the income of Company A in 2007 and that in 2008 were equal and the amount invested in 2007 was Rs12 lakh, what was the amount invested in 2008? 

 If the total amount invested by the two companies in 2009 was Rs 27 lakh, while the amount invested by Company B was 50% of the amount invested by Company A, what was the total profit earned by the two companies together? 

 If the amount invested by the two companies in 2005 was equal, what was the ratio of the total income of the Company A to that of B in 2005?