A 270 m long train running at the speed of 120 kmph crosses another train running in opposite direct...........

Quantitative Aptitude ( CCS) Problems on trains

A 270 m long train running at the speed of 120 kmph crosses another train running in opposite direction at the speed of 80 kmph in 9 seconds. What is the length of the other train?

180

230

245

235

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Master Problems on trains

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Explanation:

Relative speed = total lenghths /time
[120 +80] x5/18 ={ 270 + other train length (say L) } / 9 sec (x5/18 to convert km/hr to m/sec )
200 x (5/18) x9 = 270 + L
500 = 270 +L
L=230 m
Note: always do cutting ,avoid solving exact