If the perimeter of one face of a cube is 20 cm then it's surface area sq cm is
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each face of cube is a square
so perimeter of square=20
4×a=20 where a is side of cube
a=5
so surface area of cube=6a^2=6×5^2
6×25=150
so perimeter of square=20
4×a=20 where a is side of cube
a=5
so surface area of cube=6a^2=6×5^2
6×25=150
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