SOLUTION: Question : two planes which are 2385 miles apart fly toward each other. Their speeds differ by 45 mph. If they pass each other in 3 hours, what is the speed of each?

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Question 503269: Question : two planes which are 2385 miles apart fly toward each other. Their speeds differ by 45 mph. If they pass each other in 3 hours, what is the speed of each?


Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
Plane I x mph
Plane II x+ 45
..
They are moving towards each other They are moving towards each other

So add up their speed.

combined speed = x+ x + 45
( 2 x + 45 )
Time = 3 hours
Distance = 2385 miles
Distance = speed * time
( 2 x 45 )* 3 = 2385
6 x + 135 = 2385
6 x = 2385 + -135
6 x = 2250
/ 6
x= 375 mph Plane I
Plane II 375 + 45 = 420 mph