two trains are running in opposite direction with a speed of 62km/hr and 40km/hr respectively .if the length of one train is250 meters and they cross each other in 18 seconds then what is the length of the other train
Answers
Step-by-step explanation:
in the question given is that Two trains are running in opposite directions with speeds of 62 km/h and 40 km/h respectively.
whenever we have a problem to be solved with the two moving objects we should use the concept of relative speed.
“Relative” means “in comparison to”.
which says if the two moving objects are moving To make things simpler, one body can be made stationary (i.e. Speed =zero) and take the Speed of the other body with respect to the stationary body, which is the sum of the Speeds if the bodies are moving in the opposite direction and the difference if they are moving in the same direction. This Speed of the moving body with respect to the stationary body is called the Relative Speed.
two trains are moving with speed 62 km/h consider train A
train b with 40 km/h
relative speed of train A is = 62 + 40 =102 km/h= (102 * 5) / 18 = 28.33 m/s
speed = distance / time
two trains require 18 sec to cross each other
distance would be sum of length of trains consider the train a ha s length 260 m so train be length Y
speed = distance / time
102 km/h = ( 260 + Y) m/ 18
y= 250
reative speed s1+s2=62+40=102kmph or 28.33 mps
total distance=length of train one+train of length of two=260+x.
(x=length of train two)
time 18 sec
260+x=(102*5)/18*18
260+x=510
x=510–260
x=250 ans