Give the step-by-step reasoning process and then the final answer. In mid-May, the river flowing through Moreland is five feet deep. By mid-June, the river is 10 feet deeper than mid-May. By mid-July, the river is three times deeper than mid-June. How many feet deep is the river by mid-July?
In mid - June, the river is 5 + 10 = 15 feet deep. In mid - July, the river is 15 * 3 = 45 feet deep.
The final answer: 45.