Math, asked by suzuya, 1 year ago

a cubes diagonal is 9√3 ,find its area

Answers

Answered by mysticd

Hi ,

Let a , d are side and diagonal of a

cube ,

d = 9√3 ( given )

√3a = d

√3 a = 9√3

a = 9√3/√3

a = 9 units

Total surface area = 6a²

TSA = 6 × 9²

= 6 × 81

= 486 sq units

I hope this helps you.

: )

suzuya: can we use Pythagorean theorum for this?

mysticd: diagonal of a cubiod ( d ) = √( l² + b² + c²)

mysticd: here in a cube l = b = h = a

mysticd: d = √ ( a² + a² + a² )

mysticd: d = √3a² = √3 × a

suzuya: thank you ..that ll really help

mysticd: yes , we use Phythagoruas Theorem

Answered by Anonymous

Hi,

Please see the attached file!

Thanks

Attachments:

suzuya: thank you so much

Anonymous: Welcome suzuya sister. :)

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