A and B enter into a partnership, with A investing three times as much as B. However, B is the working partner and is entitled to a salary of Rs. 50,000 per month paid from the gross profit, in addition to his share of the profit. If the gross profit at the end of the year is Rs. 30 lakh, what is the total money received by B?

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?