Question

If the side of the square increased by 21 percent then it's are??

Answer 1

Hi friend..............(@_@)
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Here's your answer..........
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Let the side of the square be x unit.

so, the area = x² unit²

the side is increased by 21%
so, the side is , x+ x×21/100 unit
= 121x/100 unit

now, the area =(121x/100)² unit²

so, its area is increased by (121x/100)²-x²/x² ×100 %

= (14641x²-10000x²)/(10000× x² ) × 100%

= 4641x²/ 10000x² × 100%

= 4641/100 %

=46.41 %
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