18 is the correct answer
Answer: 18 hours
Explanation:
Takes 16 hours = 8 miles
? = 9 miles
Let the unknown number of hours be represented with Z. Cross multiplying we have....
16 X 9 = Z X 8
8Z = 144
Z = 144/8
Z = 18
It takes 18 hours to hike 9 miles
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