Multiple choice

The first third of a 75-mile trip took twice as long as the rest of the trip. If the first third took h hours, what was the average speed, in miles per hour, for the whole trip?

  1. 25/h

  2. 75/2h

  3. 50/h

  4. 125/2h

  5. 225/2h
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The given information is that the whole of the trip of 75 miles was covered in h + h/2 hours, or 3h/2 hours. So, the average speed per hour was (distance/number of hours) = 75/(3h/2) = 150/3h = 50/h miles.

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