Answer:
180 cm²
Step-by-step explanation:
x = length
y = width
perimeter of a rectangle is the sum of all sides, so, 2×length plus 2×width.
x = 5y
72 = 2x + 2y
using the first equation as substitute in the second equation
72 = 2×(5y) + 2y = 10y + 2y = 12y
y = 6 cm
x = 5y = 5×6 = 30 cm
area = x × y = 30 × 6 = 180 cm²
