Two heavily loaded sixteen-wheeler transport trucks are 940 kilometers apart, sitting at two rest stops on opposite sides of the same highway. Driver A begins heading down the highway driving at an average speed of 90 kilometers per hour. Exactly one hour later, Driver B starts down the highway toward Driver A, maintaining an average speed of 80 kilometers per hour. How many kilometers farther than Driver B, will Driver A have driven when they meet and pass each other on the highway?  Select the correct option:
A) 90
B) 130
C) 150
D) 140
E) 450
I've been reading the website for a while and I'm always keen to see different approaches so I would like to share one that works for me:   Short version:   Truck A travels for an hour.   140istance remaining = 940-90= 
<gadget id="calculator">940-90</gadget>
<output>850</output>
850k   Ratio of speeds 9:8 -&gt; 850/17= 50   Truck A = 90 + 50*9= 
<gadget id="calculator">90 + 50*9</gadget>
<output>540</output>
540   Truck B= 50*8= 
<gadget id="calculator">50*8</gadget>
<output>400</output>
400   140elta= 140km   Answer 140
<result>D</result>
Two heavily loaded sixteen-wheeler transport trucks are 940 kilometers apart, sitting at two rest stops on opposite sides of the same highway. Driver A begins heading down the highway driving at an average speed of 90 kilometers per hour. Exactly one hour later, Driver B starts down the highway toward Driver A, maintaining an average speed of 80 kilometers per hour. How many kilometers farther than Driver B, will Driver A have driven when they meet and pass each other on the highway?