Proposals for a parking ramp have been defeated, so we plan to build a parking lot in the downtown urban renewal section. The cost of land is 200W 100D, where W is the width along the street and D is the depth of the lot in meters. The available width along the street is 100 m, whereas the maximum depth available is 200 m. We want the size of the lot to be at least 10,000 m2 . To avoid unsightliness, the city requires that th