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The length of the car park is 120m longer than its width the are of the car park is 6400m² What are the dimensions of the car park?

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let x = wdith
length =  x +120
Area =  L . W
thus
6400 =  x(x + 120) 
               x² + 120x
  x² + 120x - 6400 =0
  (x +160)(x -40) = 0
                 x = 40
length = x + 120=  40 + 120  = 160m
width =  40m

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