Among three partners A, B and C in a business, the capital of B is equal to half the difference between thrice the capital of C and twice the capital of A. If at the end of the year, they received a total profit of ₹25,415, what is the share of C (in ₹), assuming profits are shared in proportion to their capitals?

Three partners invested in a business in the ratio 8:5:4. They invested their capital for 3 months, 10 months, and 9 months respectively. What was the ratio of their profits?

A started a business with an investment of ₹21,000 and after a few months, B joined him with an investment of ₹15,000. At the end of the year, the total profit was divided between them in the ratio 12 : 5. After how many months did B join the business?