Let side of square be a
Let length of rectangle be l and breadth of rectangle be b
Then, according to question,
a = b and l = 5b = 5a
Given, Area of square is 36 m².
a² = 36.
Or, a = 6
So, b = 6 and l = 5b = 30
Area of rectangle = l×b = 30 × 6 = 180m².