The total time taken by the woman to get the document in the round trip is 1.6 hours.
The given parameters;
distance between city A and city B, = 40 miles
the average speed of the woman, v = 50 miles per hour
To find:
- the total time taken by the woman during the journey
The total distance of the round trip is calculated as follows;
- From B back to A = 40 miles
Total distance of the round trip = 40 miles + 40 miles = 80 miles
The average speed of the woman is given as;
[tex]average \ speed \ = \frac{total \ distance }{total \ time } \\\\total \ time = \frac{total \ distance }{average \ speed} \\\\total \ time = \frac{80 \ miles }{50 \ miles/hr} \\\\total \ time = 1.6 \ hours[/tex]
Thus, the total time taken by the woman to get the document in the round trip is 1.6 hours.
Learn more here: https://brainly.com/question/17289046