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
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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(52884) (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?
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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.
