The rectangle has a total perimeter of 125 cm:
Shorter side=5
Write an equation and solve it to find the length of the longer side of the rectangle.

2x + 10 = 125; x = 57.5 cm
x + 5 = 125; x = 120 cm
5x = 125; x = 25 cm
25x = 125; x = 5 cm