Answer
$65$ mph
Work Step by Step
(Linear) speed is measured as (distance covered)/(time passed)
Unit: miles per hour
From 9:54 to 10:06, 12 minutes have passed.
12 min =$\displaystyle \frac{12}{60}$ hours = $0.2$ hours
speed$=\displaystyle \frac{13\text{miles}}{0.2\text{hours}}=65$ mph
