# Cuboid easy

The cuboid has the dimensions a = 12 cm, b = 9 cm, c = 36 cm. Calculate the length of the body diagonal of the cuboid.

Result

u =  39 m

#### Solution:

$a=12 \ \\ b=9 \ \\ c=36 \ \\ u=\sqrt{ a^2+b^2+c^2 }=\sqrt{ 12^2+9^2+36^2 }=39 \ \text{m}$

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