Posted by **Khusbu** on Saturday, June 28, 2014 at 4:08am.

If d length n breath of a rectangle r increased by 10% then by wt %wiil the area increase?

- math -
**MathMate**, Saturday, June 28, 2014 at 5:53am
If the shapes are similar, area increase as the square of the ratio of the lengths.

In this case, the shape remains the same,

so

old area = d*n

new area = (1.1d)(1.1n)

= (1.1)² dn

= (1.1)² old area

Percentage increase in area

= 1.1²-1

= 21%

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