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 2408 miles?
Choose the correct answer:
A) Two hours and 30 minutes.
B) One hour and 10 minutes.
C) Two hours and 25 minutes.
D) Three hours and 15 minutes.
E) Four hours and 0 minutes.
Answer is E. Four 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 = 2408/602= 
<gadget id="calculator">2408/602</gadget>
<output>4</output>
4 hours and 0 mins
<result>E</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 2408 miles?