kathy bicyles 57 km/h faster than carlos. in the same time it takes carlos to bicyle 36 km. kathy can bicyle 57 km. how fast does each bicyclist travel?

help please

Kathy travels 57km/h faster and 21 miles farther(57-36) in the same period

of time. Therefore r*t=d, 57*t=21.
t=21/57=0.3684 hours for each rider.
r*t=d, r*0.3684=36, r=97.7km/h for Carlos. r*0.3684=57, r=154.7km/h for
Kathy.