Scheme 1: First, calculate the distance that Xiao Li 1.2 hours rides:15×1.2 =18 (km), which is equivalent to the distance that Xiao Wang Cheng rides for 0.6 hours than Xiao Li. Since the distance traveled by Wangcheng Automobile per hour is more than that traveled by Xiao Li Automobile per hour 18 ÷ 0.6 = 30 (km), the distance traveled by the automobile per hour is 15+30 = 45 (km).
Scheme 2: The time of Xiao Li's cycling * * trip is: 1.2+0.6 = 1.8 (hours), and the distance of * * trip is: 15 × 1.8 = 27 (kilometers), and so is Xiao Wangcheng.
Solution 3: Xiao Li's cycling time * * * is: 1.2+0.6 = 1.8 (hours), which is equivalent to Xiao Wangcheng's car walking for 0.6 hours, indicating that the speed of the car is three times that of the bicycle (18 ÷ 0.6) =