Two trains are traveling on parallel tracks in the same direction. The faster train travels at 130 miles per hour, while the slower train travels at 80 miles per hour. At 2 o’clock the faster train is 20 miles behind the slower one. How far apart are the two trains at 5 o'clock? Options
A) 60 miles B) 80 miles C) 90 miles D) 130 miles E) 400 miles
Answer = D. 130 miles   Relational speed = 130 - 80= 
<gadget id="calculator">130 - 80</gadget>
<output>50</output>
50 miles per hour   In 3 hours, difference= 50 * 3= 
<gadget id="calculator">50 * 3</gadget>
<output>150</output>
150 miles   Fast train trailing 20 miles, so effective difference= 150 - 20= 
<gadget id="calculator">150 - 20</gadget>
<output>130</output>
130 miles
<result>D</result>
Two trains are traveling on parallel tracks in the same direction. The faster train travels at 130 miles per hour, while the slower train travels at 80 miles per hour. At 2 o’clock the faster train is 20 miles behind the slower one. How far apart are the two trains at 5 o'clock?