54. Aimée commutes to work on an interstate highway, and she had been averaging 60 miles per hour over her 1-hour round-trip. Lately, the trip has been taking 15 minutes longer each way because of road construction. What is her average speed, in miles per hour, for a round-trip with the construction delays?

Answer and Explanation

Your Answer is

Correct Answer is H

Explanation

Distance=speed*time=60*1=60, so the new speed is distance/new time=60/(1+0.5)=40, choose H