Two trains are traveling on a collision course. If train A is traveling at a speed of 350 mph and train B is traveling 28% slower, how much time will it take the trains to collide if the initial distance between the two is 1806 miles? Choose the correct choice from the following options.
A) Two hours and 30 minutes.  B) One hour and 10 minutes.  C) Two hours and 25 minutes.  D) Three hours and 0 minutes.  E) Four hours and 20 minutes.
Answer is D. Three hours and 0 minutes.   Since they are racing towards each other, the speed is accumulative, ie. 350 mph + 350*0.72 = 602 (0.72 because the second train is 28% slower)   So time before collision is total distance / total speed = 1806/602= 
<gadget id="calculator">1806/602</gadget>
<output>3</output>
3 hours and 00 mins
<result>D</result>
Two trains are traveling on a collision course. If train A is traveling at a speed of 350 mph and train B is traveling 28% slower, how much time will it take the trains to collide if the initial distance between the two is 1806 miles?