maria bicycles 8 km/h faster than carlos. in the same time it takes carlos to bicycle 48 km, elena can bicycle 72 km. how fast does each bicyclist travel

Answer 1

Who is elana? I know Carlos, and Maria. Why is elana on a bicycle?

Answer 2

sorry elana is supposed to be maria

Answer 3

Let M be marias rate
C be Carlos rate.

M-8=C

M*time-72=C*time
but time=M/48

putting all that together..

M*M/48 -72=(M-8)*M/48
solve for M first.

Answer 4

-62.2 km/h