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=<<5+10=15>>15 feet deep.
In mid-July, the river is 15*3=<<15*3=45>>45 feet deep.
#### 45