Originally Posted by

**lemonz** 4 days till exams and counting down - nerves shattered already!

here goes:

A closed cuboid with rectangular base of width xcm. Length of base is twice the width and the volumn is 1944cm^3. The surface area of the cuboid is S cm^2.

a) Show that S = 4x^2 + 5832x^-1.

b) Given that x can vary, find the value of x that makes the surface area a minimum.

c) Find the minimum value of the surface area.

Going round in circles with this one. Or, going round in cuboids. ha ha

I kill me!

thanks all