Question

Find the Perimeter of the Park
Area of a rectangular park is 2400 sq.meter. If the length of the park decreases by 5 meters the area decreases by 20 sq.metres, then what is the perimeter of the park?

Answer 1

Let l = length and b = breadth of the park.

Then, area = l*b

L*b = 2400

 

(L-5) * b = 2380

 

Lb-5*b = 2380

 

Or 2400-5b = 2380

 

Or 5b = 20

 

Therefore, b = 4

 

And l = 2400/4 = 600m

 

Thus, length = 600m and breadth = 4m