Question

find the volume
of cube of side2a unit
​

Answer 1

Answer:

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Answer 2

Length of side of cube =2a units

The length of diagonal of one face of the cube (d) is given by:

d

2

=(2a)

2

+(2a)

2

d

2

=4a

2

+4a

2

d

2

=8a

2

d=2

2

a

The length of diagonal of the cube (D) is given by:

D

2

=(2

2

a)

2

+(2a)

2

D

2

=8a

2

+4a

2

D

2

=12a

2

D=2

3

a