Question

How long in minutes would it take a car to travel 18 miles at a constant speed of 45 miles per hour? Please show your work.

Answer 1

24 min

Explanation:

Time is proportional to distance at constant speed, so it will take 18/45 = 2/5 of an hour. That's 2/5 of 60 minutes, or 24 minutes.

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The time required is ...

time = distance / speed

time = (18 mi)/((45 mi)/(60 min)) = (18×60/45) min = 24 min

It would take 24 minutes.