Did it on the fly, but I get
A rectangular storage container with an open top is to have a volume of 30 cubic meters. The length of its base is twice the width. Material for the base costs 13 dollars per square meter. Material for the sides costs 9 dollars per square meter. Find the cost of materials for the cheapest such container.
Total cost = ________________dollars
i got about $234.
i am pretty sure I did all the steps right.
First I got the equation which is C=13Lw+6LW+6WH
got it to one variable
26w^2 + 18w(30/2w^2)
derived and set equal to zero
and then plugged it in.
Did I do something wrong?