From the pie chart, the percentages for Lemon, Mango, Chickoo, and Orange are 15%, 30%, 20%, and 10% respectively. The sum of these percentages is 15% + 30% + 20% + 10% = 75%. The remaining percentage corresponds to Coconut Tree, which is 100% - 75% = 25%. We are given that the number of Coconut Trees is 280. If 25% of the total trees is 280, then the total number of trees (T) can be found by: 0.25 * T = 280 => T = 280 / 0.25 = 280 * 4 = 1120.