SOLUTION: Elisa left home and drove toward the mountains at an average speed of 74 km/h. Sometime later Stephanie left driving in the opposite direction with an average speed of 35 km/h. Aft

Question 1171824: Elisa left home and drove toward the mountains at an average speed of 74 km/h. Sometime later Stephanie left driving in the opposite direction with an average speed of 35 km/h. After Elisa had driven for four hours they were 401 km/h apart . How long did Stephanie drive?
Answer by ikleyn(52886) (Show Source): You can put this solution on YOUR website!
.
Elisa left home and drove toward the mountains at an average speed of 74 km/h. Sometime later Stephanie left driving
in the opposite direction with an average speed of 35 km/h. After Elisa had driven for four hours they were 401 km/h apart .
How long did Stephanie drive?
~~~~~~~~~~~~~

This super-simple problem can be solved in one line


    How long did Stephanie drive =  = 3 hours.    ANSWER

The formula is SELF-EXPLANATORY.

It says that Elisa covered 4*74 kilometers, and Stephanie covered the rest distance.

So, to get the Stephanie time, we divide her distance by her average speed.

That is all. Really simple problem.

RELATED QUESTIONS
Shayna left the airport and drove toward the capital at an average speed of 52 km/h. Some (answered by ankor@dixie-net.com)

Bill left school and drove toward the train station. One hour later Jessica left driving... (answered by josgarithmetic)

Ann left the store and drove toward the lake at an average speed of 70 km/h. Some time... (answered by solver91311)

Brenda left the science museum and drove toward her cabin on the lake at an average speed (answered by josmiceli)

Jose left the white house and drove toward the recycling plant at an average speed of 40... (answered by checkley77)

Jose left the White House and drove toward the recycling plant at an average speed of 40... (answered by josmiceli)

Jose left the White House and drove toward the recycling plant at an average speed of 40 (answered by josgarithmetic)

John left his house and drove toward Tampa at an average speed of 40 km/h. Rob left... (answered by richwmiller)

Josh left campus and drove toward San Francisco at an average speed of 40km/h. Rob left... (answered by josgarithmetic)