Alka, Vineeta, and Seema enter into a partnership with shares in the ratio 72 : 43 : 65. Alka increases her share by 50% after 4 months. At the end of the year, a total profit of Rs. 21600 is declared. Find Vineeta's share in the profit.

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?