Question 960854: Suppose two trains are on parallel tracks and heading toward each other. One begins at "A" and the other at "B". The distance between A and B is 400 km. If the speed of train A is 60 km/hr while the speed of train B is 80 km/hr, answer the following:
A. If both trains begin their journey at 12:00 pm, at what time will they meet?
B. If train A begins at 12:00 pm and train B begins at 12:30 pm, at what time will they meet?
Answer by josgarithmetic(39620)   (Show Source):
You can put this solution on YOUR website! Using time quantities would be easier than time points on a number line.
Question A:
____________________speed____________time______________distance
A to B_____________60________________t_________________60t
B to A_____________80________________t_________________80t
Total__________________________________________________400
Question B:
____________________speed____________time______________distance
A to B_____________60________________t+1/2_____________60(t+1/2)
B to A_____________80________________t_________________80t
Total__________________________________________________400
Questions A and B are separate questions and t between the two questions is not interchangeable. Use the data tables.
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