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 $200$W $+100$D$,$ 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 $10,000$ m$2$

$.$ To avoid unsightliness, the city requires that the