SOLUTION: Train A is 75 m long & travels at a uniform speed of 54 km/hr. Train B is125m long & travels at a uniform speed of 36 km/hr in the direction opposite to that of Train A. If these t

Algebra ->  Complex Numbers Imaginary Numbers Solvers and Lesson -> SOLUTION: Train A is 75 m long & travels at a uniform speed of 54 km/hr. Train B is125m long & travels at a uniform speed of 36 km/hr in the direction opposite to that of Train A. If these t      Log On


   

Question 886569: Train A is 75 m long & travels at a uniform speed of 54 km/hr. Train B is125m long & travels at a uniform speed of 36 km/hr in the direction opposite to that of Train A. If these trains are crossing at a double track stretch, what is the time taken for the two trains to fully clear each other ?
Answer by lwsshak3(11628) About Me  (Show Source):
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Train A is 75 m long & travels at a uniform speed of 54 km/hr. Train B is125m long & travels at a uniform speed of 36 km/hr in the direction opposite to that of Train A. If these trains are crossing at a double track stretch, what is the time taken for the two trains to fully clear each other ?
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distance=125+75=200m
speed=54+36=90 km/hr
travel time=distance/speed
=200m/(90 km/hr)
%28200m%2F90km%29%2Ahr%2A%28km%2F1000m%29%2A%283600sec%2Fhr%29=8+sec
time taken for the two trains to fully clear each other=8sec