Question 1113550
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What is the surface area of a rectangular prism with a length of 14 m, a height of 12 m, and a diagonal of 17.5 m 
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As I understand the condition,  17.5 m is the  3D  diagonal,  or LONGEST diagonal.


But it immediately leads to the contradiction:


<pre>
    {{{14^2}}} + {{{12^2}}} = 196 + 144 = 340.

    {{{17.5^2}}} = 306.25.
</pre>

As you see, &nbsp;the sum of squares of two edges lengths is greater than the square of the longest &nbsp;3D&nbsp; diagonal.


Therefore, &nbsp;I think that something is &nbsp;WRONG&nbsp; with the condition.


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If 17.5 m is not the 3D diagonal, then the problem MUST say directly and explicitly which EXACTLY diagonal is it.


The problem's formulation should not leave the gap for the student/(tutor) hypotheses or guessing - it is VERY BAD STYLE.