Question

the side of a cube measure 9 cm what will be the diagonal of the cube?

Answer 1

Side of the cube(a) =9cm
Diagonal of the cube = √3a
=√3 × 9
=9√3
(or)
=9×1.732
=15.588cm

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Answer 2

Given :

The side of a cube measure 9 cm

To find :

what will be the diagonal of the cube?

Solution:

Side of cube = 9 cm

Formula of diagonal of cube =$\sqrt{3}a$

Where a is the side of cube

So, diagonal of cube =$\sqrt{3}a=\sqrt{3}(9)=15.58 cm$

Hence The diagonal of cube is 15.58 cm