K and L start a business jointly. K invests Rs.16000 for 8 months and L remains in the business for 4 months. Out of the total profit L claims 2/7th share. How much money is contributed by L?

A Rs. 13,204

B Rs. 14,521

C Rs. 12,800

D Rs. 15,000

Correct Answer: Option C

Given share of L is 2/7 th of profit. Then, their profits are divided in to 5:2 ratio.

Ratio of K and L is

\(\frac{16000\times8}{x\times4}=\frac52\)

x = Rs. 12,800.