If the side of a square decreases by 30%, then the area of the square decreases by :

If the side of a square decreases by 30%, then the area of the square decreases by : Correct Answer 51%

Suppose the of the square = a The area of the square = a2 Now the sides are reduced by 30% . So its new side = 7a/10 New area = 49a2/100 So by reducing the diagonals of the square by 30%, the area becomes (a2 49a2/100)*100/a2 = 51% of the original. (ans)
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