Question

If the area of a face of cube is 20 cm2, then find the total surface area of the cube.
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Answer 1

Answer:

Perimeter of one face of a cube is 4a=20

⇒a=5 cm

Now the surface area will be 6a2  

=6×5×5

=150cm2

Hence, option B is correct.

Answer 2

Answer:

150cm2

Step-by-step explanation:

Perimeter of one face of a cube is 4a=20

⇒a=5 cm

Now the surface area will be 6a2  

=6×5×5

=150cm2