SOLUTION: two planes travel toward each other from form cities that are 780 km apart at rates 190 kph and 200 kph. they started at the same time. how many hours will they mett?

Question 506536: two planes travel toward each other from form cities that are 780 km apart at rates 190 kph and 200 kph. they started at the same time. how many hours will they mett?
Answer by Gogonati(855) (Show Source): You can put this solution on YOUR website!
Let assume that the planes met after x hours.
The distance traveled by first plane is 190x km, and the distance traveled from the second plane is 200x km. Since the initial distance between them was 780 km
we write the equation:
190x+200x=780, solving this equation we get:
390x=780
x=2
Answer: The planes met each other after 2 hours.
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