200laps
Given information:
The track = 1/4 miles long
We are to find the number of laps in a race that is 50 miles long.
In 1 mile, we have 4 laps
in 1/4 mile, we would have:
[tex]=\text{ }\frac{1\text{mile}}{4}\times\frac{4\text{laps}}{1\text{mile}}=\text{ 1 lap}[/tex]In 50miles, we would have:
[tex]\begin{gathered} \frac{1}{4}mile=1\text{ lap} \\ 50\text{mile = 50}\times1\times\frac{4}{1} \\ =\text{ 200laps} \end{gathered}[/tex]The number of laps that she must drive in a race that is 50 miles long = 200laps.