A process has been developed that can transform ordinary iron into a kind of super iron called metallic glass. Metallic glass is
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Perimeter (P) of a square = 4s ; where s is the length of a side
1 yd = 4s
yd = s
Area (A) of a square = s²
= ()²
Now, convert from yard to foot to inch:
()² x (
)² x (
)²
= (3 x 3 x 12 x 12) ÷ (4 x 4)
= 81 in²