Two trains start together to travel to a certain destination,one at speed of 55 km/hr and another at 65 km/hr. The former arrives 3 hours after the latter. What is the total distance. Choose the correct choice from the following answers:  A) 768 km.  B) 887 km.  C) 9002.5 km.  D) 1002 km.  E) 1072.5 km.
A _________________X Km_______________________B   Let both trains starts from A. Distance is X km. Faster trains take t hour and other one takes (t -3) hours.   For both trains distance is same to travel.   Speed of faster train /speed of slower train = time taken by slower train /time taken by faster train   65/55 = (t +3)/t   13t = 11t + 33   2t = 33   t = 16.5 hours.   Total distance = s *t = 65 * 16.5= 
<gadget id="calculator">65 * 16.5</gadget>
<output>1_072.5</output>
1072.5 km.   ANSW1072.5 km.R :OPTION 1072.5 km.
<result>E</result>
Two trains start together to travel to a certain destination,one at speed of 55 km/hr and another at 65 km/hr. The former arrives 3 hours after the latter. What is the total distance.