Question

Two people were walking 3 km / hr and 6 km / h respectively at the same direction. If a train comes from the rear side, it crosses 9 seconds and 10 seconds respectively. How much is the speed of the train

Answer 1

Let length of the train assume to be same.
Relative speed between 1 person and train= x-3
Relative speed between 2 person and train= x-5
Now
8(x-3)= 10(x-5)
By solving
x=13Km/hr5 years agoHelpfull: Yes(3) No(0)speed=distance/time
relative spped=s1-s2(same direction)
distance is same
(s1-3)*2/60 = (s1-5)*10/60
4s1-12 = 5s1-25
speed of train,s1 = 13kmph