A square cardboard has an area of 81 sq.cm. Find the perimeter of the cardboard
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Answer:
36 cm
Step-by-step explanation:
area of a square = side × side
Hence, side of a square = square root of 81
= 9
therefore, side of square = 9cm
perimeter of a square = side × 4
= 9 × 4
= 36 cm
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