Connie flew from Phoenix to flagstaff, a distance of 180 miles at a constant speed of 180 miles per hour. She then returned to the same airport at a stand speed of 90. Miles per hour. What was Connie average speed in miles/ hour

120 miles/hour

Explanation:

The average speed is the ratio of total distance covered by an object or a body to the total time taken to cover the distance.

Mathematically,

    Average speed = total distance covered/total time taken

In the case of Connie:

total distance = 180 + 180 = 360 miles

In order to calculate the time for each trip

speed = distance/time

  time = distance/speed

From Phoenix to flagstaff:

  time = 180/180 = 1 hour

From flagstaff back to Phoenix:

  time = 180/90 = 2 hours

total time taken = 1 + 2 = 3 hours

Average speed = 360/3 = 120 miles/hour

Hence, the average speed is 120 miles per hour.

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