SOLUTION: jen & jeff left their home at the same time for their seperate vacation. Jen drove east at an average rate of 75km/h and jeff drove west at an average rate of 60km/h. In how many h

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Question 1147312: jen & jeff left their home at the same time for their seperate vacation. Jen drove east at an average rate of 75km/h and jeff drove west at an average rate of 60km/h. In how many hours will they be 810 km apart?
Found 2 solutions by greenestamps, ikleyn:
Answer by greenestamps(13200) About Me  (Show Source):
You can put this solution on YOUR website!


The rate at which they are separating is 75+60 = 135km/h.

The distance apart is 810km.

time = distance/rate.

Simple arithmetic....

Answer by ikleyn(52809) About Me  (Show Source):
You can put this solution on YOUR website!
.

They separate with the average rate of 75+60 kilometers per hour.


So the distance between them will be 810 kilometers in  810%2F%2875%2B60%29 = 810%2F135 = 6 hours.