Trains Boats and Streams Practice Test 3 with solutions

Question : 21 of 40

Marks: +1, -0

A 200 m long train running at 90 km/hr crosses another train 300 m long running at 60 km/hr from opposite direction. The time taken to cross each other is:

75 sec.
60 sec.
50 sec.
12 sec.

Validate

Solution:

Their relative speed = 90 + 60 = 150 km/hr = 150 ×

5/{18}

{125}/3

m/sec
Required time =

{200+300}/{{125}/3}

{500×3}/{125}

= 12 sec.

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