SOLUTION: I do not have a textbook because I am home schooling. If anyone can help I would be grateful> Al goes 8mph; Ben goes 22mph in the opposite direction. How many hours has Ben trav

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Question 34210: I do not have a textbook because I am home schooling. If anyone can help I would be grateful>
Al goes 8mph; Ben goes 22mph in the opposite direction. How many hours has Ben traveled before they are 180 miles apart?
Answer by venugopalramana(3286) About Me  (Show Source):
You can put this solution on YOUR website!
SEE THE FOLLOWING AND TRY
Travel_Word_Problems/29256: A freight train leaves Kansas and travels due west. A passenger train departs at exactly the same time on a parallel track and travels due east at a speed that is twice the speed of the freight train. After 7 hours the trains are 945 miles apart. How fast is each train traveling?
1 solutions
Answer 16084 by venugopalramana(1088) About Me on 2006-03-05 11:24:01 (Show Source):
A freight train leaves Kansas and travels due west. A passenger train departs at exactly the same time on a parallel track and travels due east at a speed that is twice the speed of the freight train. After 7 hours the trains are 945 miles apart. How fast is each train traveling?
TRAINS ARE TRAVELLING IN OPPOSITE DIRECTIONS..SO THEIR RELATVE SPEED =SUM OF THEIR INDIVIDUAL SPEEDS
SPEED OF ONE TRAIN IS X MPH....SAY..SECOND TRAIN SPEED =2X..MPH....SO
RELATIVE SPEED =X+2X=3X...MPH
TIME =7 HRS
INTIAL DISTANCE BETWEEN THEM =0
FINAL DISTANCE BETWEEN THEM =945 MILES
SO DISTANCE CHANGE =945-0=945 MILES..HENCE
945 =7*3X=21X
X=945/21=45 MPH
SO THE 2 TRAINS TRAVELLED AT 45 AND 90 MPH.