the perimeter of 1 face of a cube is 20 cm find its surface area
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Let a be the side of the given square.
Perimeter of 1 side of the cube= 20cm
4a=20
a= 20/4
a= 5cm
TOTAL SURFACE AREA OF THE CUBE= 6a²
= 6×5×5
= 30×5= 150cm²
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