A और B ने 3 : 5 के अनुपात में निवेश करके एक साझेदारी शुरू की। कुछ महीनों के बाद, A ने अपना पैसा पूरी तरह से वापस ले लिया। वर्ष के अंत में, उन्हें 2 : 5 के अनुपात में लाभ प्राप्त हुआ। A ने कितने महीनों के लिए अपना पैसा निवेश किया था?

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?