Question

The side of a square was increased by 3 cm and therefore the area of the square increased by 10.25%. Find the changed dimension of the side of the square?(Percentage II)​

Answer 1

Side is increased by 20%

let initial length of side be x.

increased length =x+20%(x)

=1.2x

initial area = x(x)=x

2

increased area = (1.2x)(1.2x)=(1.44x

2

)

percent increase in area=

x

2

1.44x

2

−x

2

×100

=0.44×100

percentage increase in are =44%

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