Question

find the side of a cube , when its total surface area is 486 cm

Answer 1

Total surface area = 486 cm²

For cube TSA = 6a²

6a² = 486
a² = 81
a = 9cm

So required side is 9 cm

Hope This Helps You!

Answer 2

let the side of the cube be x
now
surface area = 6x^2= 486
x^2=81
x=9
therefore side of the cube is 9cm

hope this helps:p