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1. 10 mins after a plane leaves the airport, it is reported to be 40 miles away, what is the average speed in miles per hour of the plane?
- A. 400
- B. 400
- C. 400
- D. 400
Answer: Option B
Explanation:
Hints:
Average speed = 40 miles /10 min = 40 miles /(10/60) hrs = (40× 60)/ 10 mph = 240 mph
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