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21 February, 15:34

Lauren drove the 75 miles to the coast at 75mph, but got stuck in traffic and averaged 25mph on the way back.

-How many total miles did Lauren drive in this round-trip?

-How many total hours did Lauren drive in this round-trip?

-What was the average speed Lauren was driving during this round-trip?

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  1. 21 February, 16:29
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    Step-by-step explanation:

    1) The distance that Lauren drove to the coast is the same as the distance he drove back from the coast. It means that the total miles that Lauren drove in this round-trip is

    75 + 75 = 150 miles

    2) time = distance/speed

    Time spent in driving to the coast is

    75/75 = 1 hour

    His return speed is 25 mph

    Time spent in driving back from the coast is

    75/25 = 3 hours

    3) Average speed = total distance/total time

    Total distance = 75 + 75 = 150 miles

    Total time = 1 + 3 = 4 hours

    Average speed = 150/4 = 37.5 mph
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