Question

total surface area of cube is 5400 cm sq . find the surface area of all vertical face of the cube

Answer 1

Answer:

900 cm²

Step-by-step explanation:

Let the length of the edge of the Cube be a.

Then, Total Surface Area of Cube = 6a²

But, Total Surface Area of Cube = 5400 cm²

∴ 6a² = 5400

or, a² = 5400 ÷ 6 = 900

or, a = √900

or, a = 30 cm

Now, we have the length of edge of the cube, ie, 30 cm.

Area of each vertical surface of the cube = a² = 30² = 900 cm²