Trains A and B start simultaneously from stations 200 miles apart, and travel the same route toward each other on adjacent parallel tracks. If Train A and Train B travel at a constant rate of 20 miles per hour and 20 miles per hour, respectively, how many miles will Train A have traveled when the trains pass each other, to the nearest mile?
Pick one: A) 100 B) 133 C) 150 D) 167 E) 188
Since we know the distance (200) and the combined rate (40), we plug it into the formula:   Distance = Rate * Time   200 = 40 * Time   We can solve for the time they will meet cause we added the rate of Train A and Train B together.   So the time will be 200/40 from dividing 40 on both sides to isolate Time in the equation above.   Time will be 5 hours so now you can plug that in for Train A’s distance.   Distance = Rate * Time   Distance = 20 * 5= 
<gadget id="calculator">20 * 5</gadget>
<output>100</output>
100 according to answer choice 100.
<result>A</result>
Trains A and B start simultaneously from stations 200 miles apart, and travel the same route toward each other on adjacent parallel tracks. If Train A and Train B travel at a constant rate of 20 miles per hour and 20 miles per hour, respectively, how many miles will Train A have traveled when the trains pass each other, to the nearest mile?