Maria bicycles 5 km/h faster than Robert. In the same time it takes Robert to bicycle 60 km, Maria can bicycle 75km. How fast does each bicyclist travel?

Answer 1

m = 5 + r

t = 60/r = 75/m or 60 m = 75 r
so
60(5+r) = 75 r

300 + 60 r = 75 r

15 r = 300

r = 20
then
m = 25