Respuesta :
Roni and Allie are mowing the grass at the soccer field. Roni has a riding lawn mower and can mow the field in 30 minutes. Allie is pushing a lawn mower and can mow the field in 75 minutes. This can be solve by
(x/30)+(x/75) =1
X =21.43
So ronie can mow 21.43/30 = 0.71 of the field