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Question

If the side of a square is increased by 8cm, its area increased by 120cm2 .The side of the square is

A
3.5cm
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B
5.5cm
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C
2.5cm
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D
4.5cm
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Solution

The correct option is A 3.5cm
(x+8)2=x2+120
16x=56x=3.5cm

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