Jane goes the trip of \(40\) miles, the first \(20\) miles at \(60\) miles per hour and the rest \(20\) miles at \(30\)

[BTGmoderatorLU]

Jane goes the trip of \(40\) miles, the first \(20\) miles at \(60\) miles per hour and the rest \(20\) miles at \(30\) miles per hour, what is the average speed of the entire trip?

A. \(30\,\text{miles/1hr}\)
B. \(36\,\text{miels/1hr}\)
C. \(40\,\text{miles/1hr}\)
D. \(42\,\text{miels/1hr}\)
E. \(45\,\text{miles/1hr}\)

The OA is C