Choose one or more conversion factors that can best be used to convert 50 (km)/(myr)(kilometers per million years) to (cm)/(yr) (centimeters per year).
(100 cm)/(1 m)
(1 myr)/(1yr)
(1000 m)/(1 km)
(1 km)/(1000 m)
(1min)/(60sec)
(60 min)/(1 hr)
(1hr)/(60 min)

now convert 50 (km)/(myr)to )/(yr). (cm)/(yr)