1.

The diagonal of the cuboid with dimensions 9cm × 12cm × 20cm is ………… A) 41 cm B) 32 cm C) 25 cm D) 21 cm

Answer»

Correct option is: C) 25 cm

We have l = 9 cm, b = 12 cm & h = 20 cm.

\(\therefore\) The length of the diagonal of cuboid =  \(\sqrt {l^2 + b^2 + h^2}\)

\(\sqrt {9^2 + 12^2 + 20^2} = \sqrt {81 + 144 + 400} = \sqrt {625} = 25 cm\)

Hence, the diagonal of the cuboid is 25 cm.

Correct option is: C) 25 cm



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