MathematicsThe total surface area of a cube of side 20 cm is

The total surface area of a cube of side 20 cm is

A
400 sq.cm
B
1600 sq.cm
C
2400 sq.cm
D
8000 sq.cm

Solution:

$a = 20 c m$

The total surface of cube $= 6 a^{2}$

$= 6 {(20)}^{2}$

$= 6 \times 400$

$= 2400 c m^{2}$

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