Question

A rectangular storage container with an open top is to have a volume of 10 m3. The length of this base is twice the width. Material for the base costs $15 per square meter. Material for the sides costs $9 per square meter. Find the cost of materials for the cheapest such container. (Round your answer to the nearest cent.)

Answer 1

what is your opinion ?

Answer 2

what will be the first step ?

Answer 3

what you know that l=2w

Answer 4

and the volum of rectangular container V=10 m^3

Answer 5

so do you know what is the formula of volum of a rectangular container ?

Answer 6

so if you dont like cooperating nothing i not can help to you

sorry

good luck

bye

Answer 7

i' sorry, i was on another problem, and posted this one to see response.
the formula is V=BLW, but since 10 is the V, and L is 2b, it becomes V=(W)2(B^2). right?

Answer 8

what sign B there ?

Answer 9

so B would be: \[\sqrt{5w}\] right?
and then, it's asks for the costs, so would i then do:
C=15(B)+9(S)
C=15(B)+9(2L+2W)
\[C=15(\sqrt{5w})+9(2(2\sqrt{5w})+2w)\]
\[C=15\sqrt{5w}+36\sqrt{5w}+18w \]
\[C=51\sqrt{5w}+18w\]
then \[C \prime=\frac{ 51/2 }{ \sqrt{5w} } +10\]
\[C \prime=0=\frac{ 25.5}{ \sqrt{5w} } +10\]

Answer 10

what do you mean
"sign B there"?

Answer 11

so there is V=BLW there what is B because you know that l is the lenght of base and w is the width of base so B what is ?

Answer 12

ohhh ok. i though volume is ohhh... i did it wrong. it's suppose to be height isn't it.

Answer 13

so than for you can calcule this cost you need to know area of every sides ,yes ?

Answer 14

so than you need calcule the height ,yes ?