Math 251 - Section 14.8 - Lagrange Multipliers Example (4 of 5)

Section 14.8 - Lagrange Multipliers (4 of 5)
Another example of the method of Lagrange Multipliers.

[spiridiant]

9/3 is 3 so x should've been sqrt(3);

[blunderpolicy]

Wouldn't the final answer be 480/(sqrt3) (or equivalently 160(sqrt3)) ? 3 x 4 x 5 x 8=12 x 40 = 480