Trains Boats and Streams Practice Test 5 with solutions

Let the length of the train = x m
Speed = y kmph
Time = 10 seconds
=

10

60

=

1

6

hrs
So, speed =

d

t

=

x

1 6

= 6x mph
Now length of the platform = 200m
Total length = (x + 200) m
Time taken by the train to cross the platform
=

20

60

= /3 hrs
So, speed =

x+200

1 3

= 3x + 600 mps ……(ii)
From equation (i) and (ii) we get,
6x = 3x + 600
3x = 600
x = 200
So, the length of the train 200 meter is 200 m