Johan walks 10 miles at an average rate of 2 miles per hour and returns on a bicycle at an average rate of 10 miles per hour. How long does the entire trip take him?
A. 3 hours
B. 4 hours
C. 5 hours
D. 6 hours
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সঠিক উত্তরঃ
D.
6 hours
Explanation:
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