Joann rode her bike at an average speed of 12 miles per hour for three and a half hours. if her friend, fran, rides for 3 hours, at what average speed, in miles per hour, would she have to ride her bike to travel the same distance that joann traveled?

Average speed of Fran should be 14 miles/hour

Explanation:

Since distance covered by both are same thus

1) Distance covered by Joann =

   Distance = 12mph x 3.5 h

   Distance = 42 miles

Now For Fran to cover the same distance in 3 hours his speed should be

a would be the answer

answer; participant observation method;