Let's start by converting container 1 to feet.
21³ = 9261
43³ = 79507
That leaves us with a total of 88768. That's the answer to the first part.
Next we'll move to container 2.
48³ = 110592
This doesn't make any sense, because the crate on number two is bigger than both crates in number 1. Normally, if you put the ∛ expression on your calculator in, you could easily find the difference and find the answer.
So I'll just show you what I mean.
88768 - 110592 = -21824
You CANNOT have negative volumes. But assuming we don't, we can do ∛21824. That equals 27.9...
I'm sorry I'm not much help.
