After noting down the odometer reading, which showed the smallest four-digit square number, Rimzim started driving to school at a constant speed at 9:00 A.M. After one hour, he realized he would be late and doubled his speed. He reached school at 11:00 A.M. In the school parking lot, he noticed that the odometer now showed the smallest four-digit number that reads the same from both sides and is greater than 1200. What was Rimzim's speed at 9:50 A.M.?(round to one decimal place)