A 270 metres long train running at the speed of 120 kmph crosses another train running in oppo...........

Quantitative Aptitude ( CCS) Problems on trains

A 270 metres 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?

230 m

240 m

260 m

320 m

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Explanation:

Relative speed = (120 + 80) km/hr = 200 * 5/18 = 500/9 m/sec
Let the length of the other train be x metres.
Then, (x + 270)/9 = 500/9
x + 270 = 500
x = 230