Question

The total surface area of acute is 864cm2.find it's edge?

Answer 1

Given

surface area of cube = 864 cm^2

To find

Edge of cube

Solution

As we know that

surface area of cube = 6 × edge^2

864 = 6 × edge^2

edge^2 = 864/6

Edge^2 = 144

Edge = 12 cm

Answer 2

Heya ☺

Given that

T.S.A of a cube = 864 cm^2

Edge = ?

Solution

T.S.A. of a cube = 6 × (edge)^3

=> 864 = 6 × (edge)^2

=> 864/6 = (edge)^2

=> 144 = (edge)^2

=> edge = √144

=> edge = 12 cm

Hence , the edge of the cube is 12 cm.



Thanks