Question

If the sides of a square are increased by 30 % find the percentage increase in its area

Answer 1

Let side of square be "x"

=) So it's area = side × side

= x × x = x^2

=) new side of square = x + 30% of x

= x + 30/100 ×x

= x + 3x/10

= 13x/10

=) new area = 13x ×13x / 100

= 169x^2/100

increase in area = 169 x^2 /100 - x^2

= 69 x^2/ 100

% increase in area = 69x^2 ×100 /100x^2

= 69 % ans

___________________________________________.

Answer 2

Answer:

69% is the correct answer