P and Q are 27 km away. Two trains with speed of 24 km/hr

P and Q are 27 km away. Two trains with speed 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

Let the trains meet after t hours, then
24t – 18t = 27
⇒ 6t = 27

⇒ t =	27
	6

=	9	hours
	2

∴ QR = 18t = 18 ×	9	= 81 km
	2