Answer: Longest side = 19 ft
Explanation:
We are given a triangular shaped with two equal sides.
Let length of equal side be x ft
Third side is 4 ft longer than equal side.
Third side = (x+4) ft
Three sides of triangular garden are x, x and x+4.
The perimeter of triangular garden is 49 ft.
Perimeter of triangle = Sum of all three sides
Perimeter of triangle = 49 ft
x+x+x+4=49
3x=49-4
3x=45
x=15 ft
Longest side = x+4 => 15+4
Longest side = 19 ft