SOLUTION: 2 trains start at the same place at the same time but in opposite directions.Their speeds are 80 km/hr and 90 km/hr respectively. After how long will they be 850 km apart?

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Question 1036967: 2 trains start at the same place at the same time but in opposite directions.Their speeds are 80 km/hr and 90 km/hr respectively. After how long will they be 850 km apart?
Found 2 solutions by ikleyn, Alan3354:
Answer by ikleyn(52781) About Me  (Show Source):
You can put this solution on YOUR website!
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2 trains start at the same place at the same time but in opposite directions.
Their speeds are 80 km/hr and 90 km/hr respectively. After how long will they be 850 km apart?
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The distance between the trains increases at the rate of 80 + 90 = 170 km%2Fhour.

Hence, the time under the question is 850%2F170 = 5 hours.


Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
"respectively" is superfluous in this statement.