Find the area of four walls of a cube whose one edge is of length 2.5 m.

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Solution

Edge of the cube (a) = 2.5 m
Area of each wall = 2.5 x 2.5 = 6.25 $m^{2}$ .
No. of walls = 4

=> Area of four walls = 4 x 6.25 $m^{2}$ . = 25 $m^{2}$

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