You drive the 4400km from coast to coast of the United States at 65 mi/h(105 km/

Question

You drive the 4400km from coast to coast of the United States at 65 mi/h(105 km/h) stopping an average of 25min for rest and refueling after every 3.0h of driving.

Part A

What is your average velocity for the entire trip?

Express your answer using two significant figures.

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Part B

How long does the trip take?

Express your answer using two significant figures.

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You drive the 4400km from coast to coast of the United States at 65 mi/h(105 km/h) stopping an average of 25min for rest and refueling after every 3.0h of driving.

Part A

What is your average velocity for the entire trip?

Express your answer using two significant figures.

vav =   km/h  

SubmitMy AnswersGive Up

Part B

How long does the trip take?

Express your answer using two significant figures.

ttrip =   h  

SubmitMy AnswersGive Up

Explanation / Answer

average velocity = distance/time

time if nonstop = 4400/105= 41.9 hours

so 41.9/3 = 13.96

so 13 stops

so 13*25 = 325 minutes of breaks= 5.42 hours

so total times = 41.9+5.42

so average speed = 4400/(41.9+5.42)= 92.98 km/hr

b) it takes 41.9 + 5.42= 47.3 hours

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