Explanation: ধরি, Polash এর investment \(x\) for 12 months. Qader এর investment \(2x\) for 6 months (July 1 to Dec 31). Sohel এর investment \(3x\) for 4 months (Sep 1 to Dec 31). Polash's investment time share \(= 12x\). Qader's investment time share \(= 2x \times 6 = 12x\). Sohel's investment time share \(= 3x \times 4 = 12x\). Investment shares are equal (12x:12x:12x or 1:1:1). So, Sohel এর Profit \(= \frac{72,000}{3} = 24,000\).
