The Board shall give not less than five (5) days' public notice for the hearing of the appeal as well as the best type of notice possible, to the parties in interest, and thereafter decide the same within a reasonable time. Upon the hearing any party may appear in person or by agent or by attorney. In addition to the notice herein provided, the Board shall cause such a notice to be posted upon the premises which are the subject of the appeal, the substance of which shall be a hearing to be held before the Board of Zoning Adjustment on a date specified concerning said premises and directing all persons interested therein to appear before the Board and make their objections, if any, known.