Trains Boats and Streams Practice Test 4 with solutions

Question : 25 of 40

Marks: +1, -0

A train running at the speed of 108 kmph, crosses a 365 meter long platform in 21 seconds. What is the length of the train?

Solution:

Speed of the train = 108 kmph
=

108 × 5/{18}

= 30 m/s
Let the length of the train = x
Length of the platform = 365 meters
Time = 21 seconds
21 =

{x+365}/{30}

21 × 30 = x + 365
x = 630 - 365
x = 265 meters

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