Correct Answer - Option 3 : 37500 m²
Let the length of the rectangular field be 10x
Breadth of the rectangular field = 10x × (60/100) = 6x
As we know,
Perimeter of the rectangular field = 2 (l + b)
2 (l + b) = 800
⇒ (10x + 6x) = 400
⇒ 16x = 400
⇒ x = 400/16
⇒ x = 25
Now,
Area of rectangle = l × b
Area of the rectangular field = 10x × 6x
Area of the rectangular field = 60 × 25 × 25 = 37500 m2
∴ Area of rectangular field = 37500 m2