posted by Khusbu .
If d length n breath of a rectangle r increased by 10% then by wt %wiil the area increase?
If the shapes are similar, area increase as the square of the ratio of the lengths.
In this case, the shape remains the same,
old area = d*n
new area = (1.1d)(1.1n)
= (1.1)² dn
= (1.1)² old area
Percentage increase in area