leilaelmazry
29.01.2021 •
Physics
While on a car trip of 1000 km, you travel half of the distance at 90 km/hr and the other half at 60 km/hr. On the return trip, you travel half the time at 90 km/hr and the other half at 60 km/hr. What is your average speed for the entire trip (in km/hr)?
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Ответ:
d. Mallory and Bert. divide distance by time and both are 2.