CREATE TABLE table_1690 ("Province" TEXT, "Provincial capital" TEXT, "Largest city" TEXT, "Area  ( km 2  ) " FLOAT, "Population  ( 2013 ) " FLOAT)

what is minimum area where the largest city is bloemfontein?
SELECT MIN("Area (km 2 )") FROM table_1690 WHERE "Largest city" = 'Bloemfontein'
SELECT MIN("Area (km 2 )") FROM "table_1690" WHERE "Largest city" = 'Bloemfontein'