Solve the Problem $\frac { 15 \sqrt { 2 } } { 2 }$

Solve the problem.
-Find x.

A) 15
B) $\frac { 15 \sqrt { 2 } } { 2 }$
C) $\frac { \sqrt { 30 } } { 2 }$
D) $15 \sqrt { 2 }$