SOLUTION: Roman and Paul are driving on the same highway and both drive at a constant speed. Roman drives at 90 km/h and is 30 km ahead of Paul. If Paul drives at 100km/h, how long will it t

Algebra ->  Average -> SOLUTION: Roman and Paul are driving on the same highway and both drive at a constant speed. Roman drives at 90 km/h and is 30 km ahead of Paul. If Paul drives at 100km/h, how long will it t      Log On


   

Question 1188562: Roman and Paul are driving on the same highway and both drive at a constant speed. Roman drives at 90 km/h and is 30 km ahead of Paul. If Paul drives at 100km/h, how long will it take for Pual to catch Roman?
Answer by ikleyn(52756) About Me  (Show Source):
You can put this solution on YOUR website!
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Roman and Paul are driving on the same highway and both drive at a constant speed.
Roman drives at 90 km/h and is 30 km ahead of Paul.
If Paul drives at 100km/h, how long will it take for cross%28Pual%29 Paul to catch Roman?
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The initial head start distance is 30 km, and the approaching rate (the relative speed) is  100 - 90 = 10 km/h.


Therefore, it will take  30%2F10 = 3 hours for Paul to catch Roman.

Solved.

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