Trains Boats and Streams Practice Test 3 with solutions

Question : 17 of 40

Marks: +1, -0

A train of length 150 m takes 40.5 seconds to cross a tunnel of length 300 m. The speed of the train (in kmph) is:

Solution:

Length of the train = 150 m
Length of the train = 300 m
Total length = 450 m =

{450}/{1000}

km
Time = 40.5 second
=

{40.5}/{60×60}

hrs
Speed of the train = y

{40.5}/{60×60}

{{450}/{1000}}/y

y =

{450}/{1000}×{60×60}/{40.5}

{40×3.6}/{40.5}

= 40 kmph

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