Answer:
The length of the rectangular plot of land is;
![125\text{ ft}](https://img.qammunity.org/2023/formulas/mathematics/college/gs5vp4s1qbpus0wlgpmmeke4dmh23q8heq.png)
Step-by-step explanation:
Given the figure in the attached.
The diagonal length of the rectangle is given as;
![c=325\text{ ft}](https://img.qammunity.org/2023/formulas/mathematics/college/jevl1n5toqeqq522ywrsaqnb638atibpwu.png)
The width of the rectangle is given as;
![w=300\text{ ft}](https://img.qammunity.org/2023/formulas/mathematics/college/qaznzx2yj2r8mt6fxvigmxlgh3dlu0tqts.png)
The diagonals, width and the length of the rectangle forms a right angled triangle.
So, the length of any of the legs can be calculated using Pythagorean theorem.
with the diagonal as the hypotenuse.
![\begin{gathered} c^2=a^2+b^2 \\ c^2=w^2+l^2 \\ l^2=c^2-w^2 \\ l=\sqrt[]{c^2-w^2} \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/t0pwtb5zsfps57mnwu9p19tq40tx1ygilx.png)
Substituting the given values;
![\begin{gathered} l=\sqrt[]{325^2-300^2} \\ l=\sqrt[]{15625} \\ l=125\text{ ft} \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/bgohfn1wzuvhgo6p8e40h9ls0c0t1o40nw.png)
Therefore, the length of the rectangular plot of land is;
![125\text{ ft}](https://img.qammunity.org/2023/formulas/mathematics/college/gs5vp4s1qbpus0wlgpmmeke4dmh23q8heq.png)