Question

PLEASE HELP! There is a picture below that explains everything!

Answer 1

The area of the original plot is 200 x 300 = 60000 

So the problem says 

(x + 200)(x + 300) = 120000 

Proof: 300 x 400 = 120000 

x^2 + 500x + 60000 = 120000 

x^2 + 500x - 60000 = 0 

(x + 600)(x - 100) = 0, so 

x = - 600 (reject), x = 100 

So x = 100 meters 

Proof: 300 x 400 = 120000

Answer 2

Answer:

100

Step-by-step explanation:

200*300 = 60000

[(200 + x) (300 + x)]/2= 60000

60000 + 500x + x^2 = 120000

500x + x^2 = 120000

100