Question

Find the length of the longest rod that can fit in a cubical vessel of side √81cm

Answer 1

Answer:

$\sqrt{243}$

Step-by-step explanation:

Base Diagonal = $\sqrt{81+81}$

Therefore 3d Diagonal = $\sqrt{81+81+81}$ = $\sqrt{243}$

Answer 2

Answer:

The longest rod will be of the length which is the diagonal.

Side of cube = 9 cm

Diagonal (of a cube) = side × _/3 = 9_/3 cm

Thus, the length of rod is 9_/3 cm

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