Question

The diagonal of a cube is 9 root 3 cm find its surface area

Answer 1

Hello!!

So diagonal of cube is side√3

so diagonal is 9√3

hence

9√3 = side√3
side = 9 √3 /√3
side = 9

Hence volume of cube is side^3

hence volume = 9 X 9 X 9
volume = 729

Hence you answer is 729

HOPE THAT HELPS YOU!!!

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Answer 2

Answer:

The diagonal of a cube = a( root 3) where a is the side............ 1

Diagonal = 9 (root 3)................. 2

From 1 and 2,

9(root 3) = a (root 3)

On cancelling (root 3) from both sides,

9 = a i.e., 9 cm is the side of the diagonal.

TSA = 6(a^2)

       =6(9*9)

       =6*81

       =486 cm^2

LSA = 4(a^2)

      =  4 (9*9)

        = 4*81

       =324 cm^2