SOLUTION: Krystal left the airport three hours before Mary. They traveled in opposite directions. Mary traveled at 35 km/h for one hour. After this time they were 155 km apart. What was Krys

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Question 1126658: Krystal left the airport three hours before Mary. They traveled in opposite directions. Mary traveled at 35 km/h for one hour. After this time they were 155 km apart. What was Krystal's speed?
Answer by ikleyn(52873) About Me  (Show Source):
You can put this solution on YOUR website!
.
K traveled 4 hours at the speed of x km/h.  He (or she ?) covered 4x kilometers in 4 hours.


M covered 35 kilometers.


4x + 35 = 155


4x = 155 - 35


4x = 120  ====>  x = 120/4 = 30 km/h  is the Krystal speed.   ANSWER

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