Trains Boats and Streams Practice Test 4 with solutions

Question : 17 of 40

Marks: +1, -0

A jogger running at 9 km/hr alongside a railway track is 240 m ahead of the engine of a 120 m long train running at 45 km/hr in the same direction. In how much time will the train pass the jogger?

72 sec
36 sec
18 sec
3.6 sec

Validate

Solution:

Their relative speed = (45 – 9) km/hr = 36 ×

5/{18}

m/s = 10 m/s
Required time =

{240+120}/{10}

{360}/{10}

= 36 sec.

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