Answer:
15 miles.
Step-by-step explanation:
The first step is to figure out how many total yards she walked. To do this, multiply how many yards are in each lap (1600 yards) by how many laps she walked (16.5).
16.5 x 1600 = 26,400
Now, simply convert 26400 yards to miles. 1760 yards are in a mile. Divide 26400 by 1760 and you will get 15. The answer is 15 miles.