The average jogging speed of James is
.
Further explanation:
Given:
Total distance travelled by james while jogging is
.
Total distance travelled by James while walking is
.
Total time taken by James is
.
Formula used:
The time required to cover a distance of
at a speed of
is calculated as follows:

Calculation:
Consider the walking speed of James as
miles per hour and the jogging speed as
miles per hour.
Time taken to cover the distance of
at a speed of
miles per hour can be calculated as follows:

Here,
is time taken to cover the distance
.
Time taken to cover the distance of
at a speed of
miles per hour can be calculated as follows:
Here,
is time taken to cover the distance
.
Total time taken to cover the total distance is
.
The above expression is represented in equation form as,

Therefore the speed of walking is
.
The speed of jogging is twice the speed of walking so, the speed of jogging is calculated as follows:

Therefore, the average jogging speed of James is
miles per hour.
Thus, the average jogging speed of james is
.
Learn more:
1. Solution of linear equation: //brainly.com/question/1682776
2. Magnitude of the speed brainly.com/question/1597065
Answer details:
Grade: Middle school.
Subject: Mathematics.
Chapter: Speed and distance.
Keywords: Speed , acceleration , distance cover, 9 mi, 1.5 mi. jogging speed, walking speed, James, Average, time, grandmother’s house.