Find the volume of a cube whose total surface area is 486cm2

6a2 = Surface area of a cube
6a2 = 486
a2 = 486/6 = 81
a = root of 81 = 9
Therefore the side = 9 cm.

So the volume of the cube = side3
= 93
= 729 cm3

Therefore the side of the cube = 9 cm
The volume of the cube = 729 cm3

  • 17
total surface area=486 cm
  • we know that surface area of cube is 6l2
  • 486=6l2
  • l2=486
  • 6
  • l2=81
  • l=81sq
  • l=9
  • we know that volume of cube is l3
side of cube=9
volume of cube=93
=9*9*9
ans=729


  • 7
Total surface area =6a2=6a2 6a2=4866a2=486 a2=4866a2=4866=81=81 a=81−−√a=81 =9cm=9cm Length of each edge =9cm=9cm volume =9×9×9=9×9×9 =729cm3=729cm3 Answer : 729cm3
  • 5
Side of a triangle are in the ratio of 12:17:25and its perimeter is 540cm . Finds its area
  • 0
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