How many laps were completed in the race with time of 3:03:50?
CREATE TABLE "table1_2175858_1" (
  "year" real,
  "date" text,
  "driver" text,
  "team" text,
  "manufacturer" text,
  "laps" text,
  "miles_km" text,
  "race_time" text,
  "average_speed_mph" text,
  "report" text
);
SELECT "laps" FROM "table1_2175858_1" WHERE "race_time"='3:03:50';