Question 143
Quadrilateral $ABCD$ has perpendicular diagonals. It is also known that $AB=100$, $BC=120$, $CD=75$. Determine the length of $AD$.
(A) 30
(B) $24 \sqrt{2}$
(C) $20 \sqrt{3}$
(D) 35
(E) $\frac{125}{2}$
(A) 30
(B) $24 \sqrt{2}$
(C) $20 \sqrt{3}$
(D) 35
(E) $\frac{125}{2}$