Answer:
Step-by-step explanation:
If the area of the square is 6400ft², it means that the length of each side of the square is √6400 = 80ft
It means that the opposite side of each triangle is 80ft. Since each triangle is a right angle triangle, we would find the length of the hypotenuse, L by applying Pythagorean theorem which is expressed as
Hypotenuse² = opposite side² + adjacent side²
L² = 80² + 70²
L² = 11300
L = √11300
L = 106.3 ft
The total length of the gutter would be the sum of the sides of the square and the two triangles.
Total length = 106.3 + 106.3 + 70 + 70 + 80 + 80 = 512.6 ft