A, B and C enter into a partnership with capitals in the ratio 2/3: 3/5: 5/6. After 8 months, A increases his share of capital to 5/4 of initial. Then find the share of C in the profit, if at the end of the year, the total profit earned is Rs. 5,820?

Convert ratios to common denominator (LCM = 30): A = 20/30, B = 18/30, C = 25/30. Let investments be A = 20k, B = 18k, C = 25k. A invests 20k × 8 = 160k, then increases to 25k for 4 months = 100k. Total A = 260k. B invests 18k × 12 = 216k. C invests 25k × 12 = 300k. Ratio = 260:216:300 = 65:54:75. Total = 194. C's share = (75/194) × 5820 = Rs. 2250.