Mrs. Bosch's science club left the school on a bus at 7:48 a.m. to go to Orlando. Mrs. Bosch drove her own car and did not leave the school until 8:40 a.m. The bus traveled at an average rate of 80 kilometers per hour. What was Mrs. Bosch's average speed, to the nearest kilometer per hour, if she met up with the bus when they stopped for lunch at 1:00 p.m.?