Solve this questin please...
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given - diagonal of cube = 9√3
to find- TSA of cube
solution:
diagonal of a cube = a√3
9√3=a√3
=> a=9
T.S.A. of cube = 6a²
=6×9²
=486 cm²
and hence option b is Correct
to find- TSA of cube
solution:
diagonal of a cube = a√3
9√3=a√3
=> a=9
T.S.A. of cube = 6a²
=6×9²
=486 cm²
and hence option b is Correct
shanu30:
Thank u so muchhhh..
you are most welcome ^^
Answered by
1
Diagnol= (a^2+2a^2)^1/2
Diagnol =(3a^2)^1/2.
9(3)^1/2=3^1/2(a)
a=9.
TSA of cube =6a^2.
=6(81)
= 486cm^2.
Answer: (c)486cm^2.
Diagnol =(3a^2)^1/2.
9(3)^1/2=3^1/2(a)
a=9.
TSA of cube =6a^2.
=6(81)
= 486cm^2.
Answer: (c)486cm^2.
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