79,350 cm
Explanation:
115x115=13,225 (this is the area of one side)
13,225x6=79,350(a cube has 6 sides)
Solve the equation for x by finding a, b, and c of the quadratic then applying the quadratic formula.
x = 7,3
Xy = 6
x = 2
2y = 6
y = 6÷2
y = 3
x + y = (2) + (3) = 5