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1. A motorist must complete 180-mile trip is 4 hours. If he averages 50 miles an hour for the first three hours of the trip , how fast must ( in terms of mile per hour ) he travel in the last hour ?
- A. 30
- B. 30
- C. 30
- D. 30
Answer: Option A
Explanation:
= 180 - (50*3) hrs
= 180 - 150 hrs
= 30 hrs.
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