(2) The county board, where it appears that the petition has been signed by 10 percent of the landowners representing not less than 10 percent of the front footage abutting the highway included in the district, shall fix a time and place for hearing the petition, which time shall be not less than 31 nor more than 50 days after the date of receipt thereof. At least 10 days prior to the hearing, the county board shall publish a notice thereof by two insertions in a newspaper of general circulation in the district. [1971 c.514 §28]