16Hit1600
Geometry and TrigonometryHardLongest diagonal of a box

Geometry and Trigonometry practice question

A rectangular box measures 4 by 6 by 10. What is the length of the longest diagonal inside the box, rounded to the nearest tenth?

Answer: 12.3

The space diagonal is √(16 + 36 + 100) = √152 ≈ 12.3.

Common wrong answers

If you answered 20
20 adds the two largest dimensions.
If you answered 11.7
11.7 uses only the 6 and 10 faces.
If you answered 7.2
7.2 uses only 4 and 6.

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