<PRE><B>Question 581118</B>
let the speed of train A be x km/h
Train B traveled at x+5 km/h


Train B traveled 144 minutes= 2.4 hours   (144/60)

Distance traveled by train B = (x+5)*2.4

Distance traveled by Train A = 2.4x

Distance traveled by train B = twice distance traveled by train A

2.4(x+5)= 2*2.4x

2.4x+12=4.8x

4.8x-2.4x=12
2.4x=12
x=12/2.4
x=5

speed of Train A = 5km/h---------- distance traveled = 2.4*5 12 km
speed of train B = 10km/h----------distance traveled = 10*2.4 = 24 km</PRE>