CREATE TABLE table_11640 ("Route Name" TEXT, "Direction" TEXT, "Termini" TEXT, "Junctions" TEXT, "Length" TEXT, "Population Area" TEXT, "Remarks" TEXT)

What is the length of the highway with remarks that it was replaced by bsi-35?
SELECT "Length" FROM table_11640 WHERE "Remarks" = 'replaced by bsi-35'
SELECT "Length" FROM "table_11640" WHERE "Remarks" = 'replaced by bsi-35'