If $x , y$ are positive real numbers such that $3 x + 4 y < 72$, then the maximum possible value of $12 x y ( 72 - 3 x - 4 y )$ is: (A) 12240 (B) 13824 (C) 10656 (D) 8640
If $x , y$ are positive real numbers such that $3 x + 4 y < 72$, then the maximum possible value of $12 x y ( 72 - 3 x - 4 y )$ is:\\
(A) 12240\\
(B) 13824\\
(C) 10656\\
(D) 8640