1.

A train running at a speed of 90 km/hr crosses aplatform double of its length in 36 sec. What is thelength of platform in meters?

Answer»

Let the length of the train be = X metres  

Length of the platform = 2x metres  

SPEED of train = 90 kmph

=90*5/18

=25 m/s

according to the QUESTION

(x+2x)/25=36

=>3x=36*25

=>x=(36*25)/3

=>x=300

length of platform = 2x = 600 m



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