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? Let's think first. Chain of thought:
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In mid - June, the river is 5 + 10 = 15 feet deep. In mid - July, the river is 15 * 3 = 45 feet deep.
Therefore, the answer is 45.
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