find the circumference to see how much of the wheel is touhing the ground
c=2pir c=2pi1.9 c=2.8pi
2.8pi=distance per 1 rotation number of rotations per second times 2.8pi=12feet per second dvide both sides by 2.8pi number of rorations per second=12/2.8pi number of roations per second=6/1.4pi number of roations per second=3/0.7pi number of roations per second=30/7pi aprox number of roations per second=1.364 rotations per second
