Question

The length and breadth of rectangular plot are in the ratio9:5. If it's perimeter is 280m. Find its area

Answer 1

Let the length and the breadth be 9x and 5x

perimeter =2(9x+5x)

280=2×14x

280=28x

x=280/28

x=10

9x=9×10=90m

5x=5×10=50m

$area = l \times b \\ = 90 \times 50 \\ = 4500 {m}^{2}$