Two trains, A and B, started simultaneously from opposite ends of a 120-mile route and traveled toward each other on parallel tracks. Train A, traveling at a constant rate, completed the 120-mile trip in 6 hours; Train B, traveling at a constant rate, completed the 120-mile trip in 4 hours. How many miles had train A traveled when it met train B?  Choose the correct choice from the following choices:	A) 28	B) 36	C) 48	D) 50	E) 54
As the ratio of the rates of A and B is 4 to 6 then the distance covered at the time of the meeting (so after traveling the same time interval) would also be in that ratio, which means that X would cover 4/(4+6)=4/10 of 120 miles:   120*4/10= 
<gadget id="calculator">  120*4/10</gadget>
<output>48</output>
48 miles.   Answer: 48.
<result>C</result>
Two trains, A and B, started simultaneously from opposite ends of a 120-mile route and traveled toward each other on parallel tracks. Train A, traveling at a constant rate, completed the 120-mile trip in 6 hours; Train B, traveling at a constant rate, completed the 120-mile trip in 4 hours. How many miles had train A traveled when it met train B?