Motion Quiz 3
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Question 1 of 2
1. Question
The perimeter of a rectangular field is 60 meters. Sofia ran around the track with a speed of 6 km/hour. How far did she run in 36 minutes?
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Solution: 6 kilometers per hour corresponds to the 10/6 meters per minute. So, Sofia run (10/6)*36=60 meters in 36 minutes.
Answer: 60 meters.

Question 2 of 2
2. Question
Nikki has to travel a total of 350 km. She travels the first 210 km in 4 hours, then she rests for 30 minutes and remainder of the trip she traveled at 70 km/hour. What is the average speed of Nikki?
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Solution: Last part of the trip equal 350210=140 km Nikki traveled at 70 km/hour. It means that she spent 2 hours to cover this distance. Therefore, the total trip time is 4+0.5+2 =6.5 hours. Total distance is 350 km. So, the answer is 350/6.5=53.8 km/h.