Question

A train traveling at 54 km/h, completely crosses another train of half its length and traveling in opposite direction at 72 km/h in 12 seconds. If it also passes a railway platform in one minute, the length of the platform is

Answer 1

velocity of the train = 54kmph = 15m/s
time = 60 seconds
distance = velocity × time
= 15×60 = 900m
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Answer 2

Given :

Speed of train A , u = 54 km/h = 15 m/s .

Speed of train B , v = 72 km/h = 20 m/s .

Time taken by train A to cross railway platform in one minute , t = 60 s .

To Find :

The length of the platform .

Solution :

We know , length of platform is equal to the distance covered in 60 seconds .

So ,

$D = ut\\\\D=15\times 60\ m\\\\D=900\ m$

Therefore , the length of the platform is 900 m .

Learn More :

Kinematics

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