Question

please send the answer will mark as brainlist​

Answer 1

Answer:

Answer

15

Step-by-step explanation:

Let actual length of square is x.

then the actual area=x²

now

(x+3)²=x²+99

x²+9+6x=x²+99

6x=90

x=15

hope it helps you....

Answer 2

Step-by-step explanation:

let the original lenght be x ,

now, Area of the square = x²

but ,new lenght = x + 3

so, new area = (x+3)(x+3)

= x² + 6x +9

Now ,Area is increased by 99.

so,

x²+99 = x² + 6x +9

= 6x +9 = 99

= 6x = 90

= x = 15