Question

the perimeter of one face of a cube is 20 cm.find total area of the six faces

Answer 1

We know , every face of cube is a square
Let the edge of the cube be 'a'
So , given , 4a = 20cm
a = 5cm
Total area = 6a² = 6*5² = 150 cm²

Answer 2

One face of a cube would be a square .
Perimeter of a square=4*side
A/q,
4*side=20
side=20/4
side =5cm
TSA of cube =6*side²
=6*5²
=6*25
=150cm²