10. A square paper sheet of length 10 2/5 cm. Find its perimeter.
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Step-by-step explanation:
Perimeter of square = 4 × side
= 4 × 10×2/5 = 4 × 10.04
= 40.16 cm .
Area of square = side × side
= 10.04 × 10.04
= 100.8016
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