Solve the Problem $^{2}$ ?
A) $x=4$ In $y=2$ In $z=2$ In
B) $x=6$ In $y=6$

Multiple Choice

Solve the problem.
-What are the dimensions of a rectangular box, open at the top, which has maximum volume when the surface area is 48 in. $^{2}$ ?

A) $x=4$ in., $y=2$ in., $z=2$ in.
B) $x=6$ in., $y=6$ in., $z=3$ in.
C) $x=8$ in., $y=2$ in., $z=6$ in.
D) $x=4$ in., $y=4$ in., $z=2$ in.