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Answer:

0.8 hr = 0.8*3600 seconds = 2880 seconds

d = 30*2880 meters = 8640 meters

d = 8.64 km

Step-by-step explanation:

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The total distance traveled in km is 86.4 km

From the question,

We are to determine the total distance traveled in km.

First, we will determine the distance traveled in m.

Distance traveled can be calculated using the formula

Distance = Speed × Time

From the given information,

Speed = 30.0 m/s

Time = 0.8 hr = 0.8 × 60 × 60 s

Time = 2880 s

Putting the parameters into the formula, we get

Distance = 30.0 × 2880

Distance = 86400 m

Now, we will convert from meters (m) to kilometers (km)

NOTE: 1000 m = 1km

If 1000 m = 1km

Then,

86400 m will be [tex]\frac{86400}{1000}[/tex] km

[tex]\frac{86400}{1000} =[/tex] 86.4 km

Hence, the total distance traveled in km is 86.4 km

Learn more on calculating distance here: https://brainly.com/question/11934786