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Problems on Trains

Q1: A 300 metre long train crosses a platform in 39 seconds while it crosses a signal pole in 18 seconds. What is the length of the platform?

A 350 m

B Data inadequate

C 320 m

D 650 m

ANS:B - 350 m

Speed = ( 300 ( m/sec = 50 m/sec.
18 3
Let the length of the platform be x metres.
Then, ( x + 300 ( = 50
39 3
=> 3(x + 300) = 1950 => x = 350 m.



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