SSC CGL 31 Aug 2016 Paper

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Question : 55 of 100

Marks: +1, -0

In what time will a 100 metre long train running with a speed of 50 km/hr cross a pillar ?

7.0 seconds
72 seconds
7.2 seconds
70 seconds

Solution:

Speed of train = 50 kmph
=

({5×5}/{18})

m/s
=

{125}/9

m/s
∴ Required time
=

({{100}/{125}}/9)

s
=

({100×9}/{125})

s
= 7.2 s

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