Ram started a business by investing Rs. 5500. After some time, Hari joined the business by investing Rs. 6600. If the total profit at the end of the year was distributed in the ratio of 2:1, after how much time did Hari become a partner in the business? (Patwar, 2013)
Let Hari stay in business for months. According to the question . Solving this gives months. So Hari joined after 12-5 = 7 months.