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NeF 15.1
A rectangular container has the following dimensions (cm)
Length $\displaystyle 3x $
Width $\displaystyle 90-3x $
depth $\displaystyle \frac{x}{3} $
Determine
15.1.1 Volume V in terms of $\displaystyle x$
15.1.2 The value for $\displaystyle x $ for which it has a max volume
15.2 The sum of two positive numbers x and y is 48
15.2.1 find y in terms of x
15.2.2 Prove that the sum of thier squares can be given by $\displaystyle 2x^3-96x+2304 $
15.2.3 Find the samllest possible value of the sum of thier squares
I have no idea >< I made a couple of attempts but it doesnt look right. weh!