Mary starts from her house, walks 80 meters south, and stops to chat with her aunt on the sidewalk. After chatting for a few minutes, she walks 125 meters to the west to meet a friend and then walks 45 meters north with her friend to a café for lunch. Overall, she takes 10 minutes to do all of this. What is Mary's average speed? A) 8 m/s B) 1.25 m/s C) 25 m/s D) 4.5 E) 0.42

E is the correct answer because you have to multiply 10 by 60 (60 seconds in a minute) before doing distance over time. you also have to add all the distances up before this.
60*10=600
125+80+45=250
so, 250/600= .416666
=E

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arshikhan8123 arshikhan8123 · Answer 2 · 2022-07-08T18:05:59+02:00

Mary's average speed is 0.42 m/s.

Converting minutes to seconds.

60 * 10 = 600

Adding the distance.

125 + 80 + 45 = 250

Speed = distance divided by time.

So, 250 / 600

= 0.416666

=0.42 m/s

Why do we calculate average speed?

Average velocity is critical to apprehend the price at which an adventure takes region. at some point of a journey, the rate may additionally range on occasion. In that case, finding the common velocity becomes crucial to have an estimate of the fee at which the adventure is finished.

Speed, being a scalar quantity, is the rate at which an object covers distance. The average speed is the distance (a scalar quantity) per time ratio.

Learn more about average speed here: https://brainly.com/question/6504879

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