1.

Edge of a cubical tank is 12cm. Find it's diagonal..

Answer»

Given,Edge(a) of the cube=12cm

We know that,

DIAGONAL of a cube = √a²+a²+a²
=√(12)²+(12)²+(12)²
=√144+144+144
=√432
=√(12)²×3
=12√3 CM

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