SOLUTION: What is the length of a diagonal of a 5 x 12 x 84 box?

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Question 1190313: What is the length of a diagonal of a 5 x 12 x 84 box?
Answer by ikleyn(52921) About Me  (Show Source):
You can put this solution on YOUR website!
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If you mean the longest 3D diagonal, then its length is


    sqrt%285%5E2+%2B+12%5E2+%2B+84%5E2%29 = sqrt%287225%29 = 85 units.    ANSWER

Solved.