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Andrew drove from his house to his sister's house in 8 hours at an average of 60 miles per hour. On the way home he drove at an average rate of 64 miles per hour. How long did it take him to drive home?

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SM141372

Answer:

288

Step -by-step explanation:I'm not explaining :D

altavistard

Answer:

It took him 7.5 hrs to drive home.

Step-by-step explanation:

The distance is the same, going or returning.

Recall that distance = rate times time.

Here, distance from Andrew's to his sister's is (60 mph)(8 hr) = 480 mi

If distance = rate times time, then time = distance / rate.

Here we have time = 480 mi / 64 mph = 7.5 hrs

It took him 7.5 hrs to drive home.