Trains Boats and Streams Practice Test 3 with solutions

Question : 9 of 40

Marks: +1, -0

Two trains 140 m and 160 m long run at the speed of 60 km/hr and 40 km/hr respectively in opposite directions on parallel tracks. Find the time (in seconds) which they take to cross each other.

10.8
10
9.6
9

Validate

Solution:

Their relative speed = (60 + 40) = 100 km/hr = 100 ×

5/{18}

m/s =

{250}/9

m/s
Required time =

{140+160}/{{250}/9}

{300×9}/{250}

= 10.8 seconds

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