NIACL Model Paper 5 with solutions for free online practice

Question : 23 of 100

Marks: +1, -0

A train running at the speed of 60 kmph crosses a 200 m long platform in 27 s. What is the length of the train ?

Solution:

(a) Let length of the train be x m
Speed of the train be 60 km/h

= 60 × 5/18=50/3

m/s
Then.

{x+200}/50/3=27

⇒

{3(x + 200)}/50=27

⇒

3x + 600 = 1350

⇒

3x= 1350-600

⇒

3x = 750

⇒

x =750/3 =250

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