Two trains are moving in same direction 60 km hr and 90 km hr Their lengths are 1 10 km and 0 9 km r...........

Quantitative Aptitude ( CCS) Problems on trains

Two trains are moving in same direction @ 60 km/hr and 90 km/hr. Their lengths are 1.10 km and 0.9 km respectively. The time taken by the slower train to cross the faster train in seconds is:

220

240

260

280

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Explanation:

Relative speed = (90 - 60) km/hr = 30 * 5/18 = 25/3 m/sec
Distance covered = (1.10 + 0.9) km = 2 km = 2000 m
Required time = 2000 * 3/25 = 240 sec