Marla begins walking at 3 mi/h toward the library. Her friend meets her at the halfway point and drives her the rest of the way to the library. The distance to the library is four miles. How many hours did Marla walk?

Question

Marla begins walking at 3 mi/h toward the library.  Her friend meets her at the halfway point and drives her the rest of the way to the library.  The distance to the library is four miles.  How many hours did Marla walk?

drwls · Answer

Half the distance. They said so. The walking speed does not matter.

Reiny · Answer

Marla walked 2 miles at 3 miles/hour. so her time walking was 2/3 hours or 40 minutes