Answer:
200 hours (yes, very long)
Explanation:
You take about 2,000 steps a mile. So, you have to multiply 2,000 by 20 which is 40,000. Then, you have to divide 40,000 by 20. Lastly, you will end up with 200 hours as your answer.
Hope this helps :)
21120 hours long
42240=20 miles
42240/2=21120h
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