# Body diagonal

Calculate the length of the body diagonal of the 6cm cube.

Correct result:

u =  10.392 cm

#### Solution:

$a=6 \ \text{cm} \ \\ u=\sqrt{ 3 } \cdot \ a=\sqrt{ 3 } \cdot \ 6=6 \ \sqrt{ 3 }=10.392 \ \text{cm}$

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