# Rectangular playing field has an area of 4000m². It is 40m longer than it is wide. If its width is w, solve the equation w(w + 40) = 4000 to find the length and width of the field to the nearest metre. Initially try w = 50?

##### 1 Answer

Aug 6, 2018

#### Answer:

#### Explanation:

Completing the square:

As w is a length, it must be positive