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2015-11-01T18:28:50+05:30

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Let the side of square = a
Area of square = a²

Length of its side is doubled = 2a
New area = (2a)²  = 4a²

Ratio of new area to its previous area = 4a² a² = 4 : 1


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2015-11-01T20:14:20+05:30
Let the side of square be 's'
area=s²
now,new side=2s
new area    =(2s)²
                   =4s²
ratio=4s²:s²=4:1
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