Problems on Trains - Arithmetic Aptitude Questions and Answers

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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?

320 m

350 m

650 m

Data inadequate

Answer : Option B

Explanation :

Speed =	\([\frac { 300 } { 18 }]\)			m/sec =\(\frac { 50 } { 3 }\)		m/sec.

Let the length of the platform be x metres.

Then,				\([\frac { X +300 } { 39 }]\)	=\(\frac { 50 } { 3 }\)