1, the speed of a cheetah is three times that of an athlete, so if you run twice as fast as an athlete every second and run 20m more, the speed of the athlete will be 20÷2= 10(m/s), and the cheetah will run 30m every second.

2.( 1) There are x people in each car.

5x+ 10=6X-32

x=42

(2)42*5+ 10=220 (person)