A motorcyclist rode to work at an average speed of 15 miles per hour and returned home along the same route at an average speed of 45 miles per hour. If his entire traveling time was 1 hour, what was the total number of miles in the round trip?
A. 15
B. 22 1/2
C. 30
D. 36 1/2
E. 45
সঠিক উত্তরঃ
B.
22 1/2
Explanation:
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