P and Q are 27 km away. Two trains with speeds of 24 km/hr and 18 km/hr respectively start simultaneously from P and Q and travel in the same direction. They meet at a point R beyond Q. Distance QR is

• I think it is 81
• 10 years agoHelpfull: Yes(0) No(3)
• If the trains meet after t h.
  Relative speed of train = (24 -18) = 6 km/h
  ⇒ Distance = 27
  ∴ t = 27/6 = 9/2 h
  ∴ QR distance travel by train which is travelling at a speed of 18 km/h = 18t = 18 x 9/2 = 81 km
• 7 years agoHelpfull: Yes(0) No(0)