Answer:
Formula for speed is given by;
[tex]\text{Speed} = \frac{\text{Distance}}{\text{Time}}[/tex]
As per the given statement:
Susie ran a race. She ran 55 miles an hour, and the race took her t hours to complete.
⇒Speed = 55 miles an hour
Time = t hour
Substitute the given values in the given formula we have;
[tex]55 = \frac{\text{Distance}}{t}[/tex]
Multiply t both sides we get;
[tex]\text{Distance} = 5t[/tex] miles.
Therefore, 5t miles long was the race.