Multiple choice

A woman drove to work at an average speed of 50 miles per hour and returned along the same route at 40 miles per hour. If her total traveling time was 1 hour, what was the total number of miles in the round trip?

  1. 45

  2. 45.4

  3. 40

  4. 44.4

  5. 22.2
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Let distance be d. Time = d/50 + d/40 = 1. (4d + 5d) / 200 = 1 => 9d = 200 => d = 22.22 miles. Round trip = 2d = 44.44 miles.

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