Two trains running on parallel tracks in opposite directions cross each others in 10.5 seconds whereas a passenger on the second train observed that he crossed the first train in 5 seconds.If the speeds of the trains are in the ration of 3:5, what is the ratio of their lengths?

a)5:6
b)4:5
c)9:10
d)10:11
e)5:8

• Speed= (3+5)x
  Length of train 1= 5*8x=40x
  Length of both trains = 10.8*8x=84x
  Length of train 2= 44
  Ratio of length= 10:11
• 8 years agoHelpfull: Yes(4) No(1)
• A's length = 15x
  B's length = (10.5 * 8x) - 15x = 69x
  so A's length : B's length = 15x : 69x = 5 : 23
• 8 years agoHelpfull: Yes(0) No(1)