Trains Boats and Streams Practice Test 3 with solutions

Question : 7 of 40

Marks: +1, -0

Train A is 75 m long and travels at a uniform speed of 54 km/hr. Train B is 125 m long and travels at a uniform speed of 36 km/hr in the direction opposite to that of Train A. If these trains cross at a double-track stretch, what is the time taken for the two trains to fully clear each other?

10 seconds
8 seconds
7.2 seconds
6.6 seconds

Validate

Solution:

Length of Trains A and B is 75 m and 125 m respectively.
Speed of Trains A and B is 54 kmph and 36 kmph respectively.
Time =

({\Sum \of \length \of \Trains \A \and \B}/{\Sum \of \speed \of \Trains \A \and \B})

({75+75}/{{54×5}/{18}+{365×15}/{18}})

{200}/{15+10}

{200}/{25}

= 8 second

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