Respuesta :
Answer:
15 inches
Step-by-step explanation:
Suppose length of original square is L inches.
Now, to form a new square the length increases by 2.5 inches
So, new length=L+2.5 inches
Given that, perimeter of new square =70 inches.
Formula:-
Perimeter=4*length of square
Therefore 70=4*(L+2.5)
70 =4 L+10
4 L=60
L=15 inches
Answer:
The original length of each side was 15 inches.
Step-by-step explanation:
In this case we have to have clear that the perimeter of square consists in the addition of the length of each one of its four sides, this is:
[tex]perimeter=a+a+a+a[/tex]
The new square has a perimeter of 70, and we have to find the original length of each side, the equation will be:
[tex]70=a+2.5+a+2.5+a+2.5+a+2.5[/tex]
[tex]70=4a+10[/tex]
We have to clear a:
[tex]a=\frac{70-10}{4} \\a=\frac{60}{4} \\a=15[/tex]
The original length of each side was 15 inches.