Question

two trains are running at a speed of 85km/h and 60km/h respectively in opposite direction.if they take 15s to pass each other compeletely,then find the length of one train,provided the length of the other is 140m​

Answer 1

Answer:

relative motion theory

145 km/h = v(A,B)

distance = (l+140)by S=ut

then( l+(140/1000))/(1/4h)=85

by this l=340-1.4=338.6 m