Joe left home traveling to Agora. At 10:32 a.m., Joe's speedometer showed that he was going 75 mi/h, and Joe knew that he had 50 miles left to travel. Assuming Joe maintains an average speed of 80 mi/h, what time will it be when he arrives in Agora? Express your answer in the form HH:MM, where HH represents the two-digit hour and MM represents the two-digit minute.