राजीव ने 1,200 रुपये का निवेश करके एक दुकान शुरू की। दिनेश चार महीने बाद 7,000 रुपये का निवेश करके उसके साथ जुड़ गया। एक वर्ष के अंत में उन्होंने कुल 13,200 रुपये का लाभ कमाया। लाभ में दिनेश का हिस्सा कितना होगा?

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?