Answer: She rode 12.5 miles per hour .She rode 12.5 miles per hour .
She will take 0.36 hours to go 4.5 miles.
Explanation:
Given : A cyclist rode 3.75 miles in 0.3 hours..
Here , distance = 3.75 miles
Time = 0.3 hours
Then, Speed =


That means : She rode 12.5 miles per hour .
Now , with the same rate the time taken by her to go 4.5 miles =


Hence, she will take 0.36 hours to go 4.5 miles.