City A and City B are 140 miles apart. Train C departs City A, heading towards City B, at 4:00 and travels at 40 miles per hour. Train D departs City B, heading towards City A, at 4:35 and travels at 20 miles per hour. The trains travel on parallel tracks. At what time do the two trains meet?	Choose the most appropriate option
A) 5:00 B) 5:30 C) 6:00 D) 6:35 E) 7:00
Train C has traveled 20 mi in the half hour before Train D has started its journey.   140-20= 
<gadget id="calculator">140-20</gadget>
<output>120</output>
120   40+20= 
<gadget id="calculator">40+20</gadget>
<output>60</output>
60 mph   120 mi/ 60 mph= 2 hrs   4:35pm + 2 hrs = 6:35pm   Answer:   D. 6:35
<result>D</result>
City A and City B are 140 miles apart. Train C departs City A, heading towards City B, at 4:00 and travels at 40 miles per hour. Train D departs City B, heading towards City A, at 4:35 and travels at 20 miles per hour. The trains travel on parallel tracks. At what time do the two trains meet?