Question

The rectangle below has a total perimeter of 125 cm.

picture of a rectangle with a width of 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

Answer 1

We know that \[P=2l+2w\]\[125=2l+2(5)\]\[125=2l+10\]\[115=2l\]\[l=\frac{115}{2}\]\[l=57.5cm\]