Method 1:
Solution: suppose that the truck travels x kilometers per hour and the bus travels y kilometers per hour.
4x+4y=560
4x-4y=60
x=77.5
y=62.5
Method 2:
Because each of them walked for 4 hours, and the bus walked 60 kilometers more than the truck, indicating that the bus traveled more than the truck per hour:
60 ÷ 4 =15km
Every hour:
(560 ÷ 4+ 15) ÷ 2 = 77.5km/h。
The truck runs every hour;
(560 ÷ 4-15) ÷ 2 = 62.5km/h