Answer:
Mr. Drew needs 167.3 ft of wood
Step-by-step explanation:
we know that
The area of a square is
[tex]A=b^{2}[/tex]
where
b is the length side of the square
we have
[tex]A=70\ ft^2[/tex]
substitute in the formula and solve for b
[tex]70=b^{2}[/tex]
square root both sides
[tex]b=\sqrt{70}\ ft[/tex]
To determine the total length of wood , calculate the perimeter of the sandbox
The perimeter of the sandbox is equal to the perimeter of 5 squares
so
[tex]P=5(4b)[/tex]
substitute the value of b
[tex]P=5(4(\sqrt{70}))=167.3\ ft[/tex]
therefore
Mr. Drew needs 167.3 ft of wood
