diagonal of cube is 9√3 find its tSA
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Given that ;
diagonal of cube = 9√3
we have to find :
total surface area of cube = ?
solution:-
we know that;
total surface area of cube = 6a²
and
diagonal of cube = √3a
here,
diagonal of cube = 9√3
=> √3 a = 9√3
=> a = 9
now,
Total surface area of cube = 6a²
=> 6×9² = 6×81
=> 486 unit² Answer
⭐✡ hope it helps :)
Given that ;
diagonal of cube = 9√3
we have to find :
total surface area of cube = ?
solution:-
we know that;
total surface area of cube = 6a²
and
diagonal of cube = √3a
here,
diagonal of cube = 9√3
=> √3 a = 9√3
=> a = 9
now,
Total surface area of cube = 6a²
=> 6×9² = 6×81
=> 486 unit² Answer
⭐✡ hope it helps :)
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