please send the answer will mark as brainlist
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1
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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....
Answered by
0
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
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