Two trains are running in same directions on parallel tracks. Train running with speed 64 Km/hr has

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01 Dec 2017 Trains

Two trains are running in same directions on parallel tracks. Train running with speed 64 Km/hr has 270 meter length and the second train running with speed of 36km/hr has 330 meter length.
What is the time taken by the faster train to pass through the complete length of slower train (from front to rear)?

OPtion

1) 77.50 seconds
2) 78.9 seconds
3) 79.8 seconds
4) 79.0 seconds
5) 70.8 seconds
6) 76.5 seconds
7) 76.8 seconds
8) 77.14 seconds
9) 79.08 seconds
10) None of these

Solution

Relative speed= 64-36 = 28 km/hr = 28 * 5/18 = 70/9 m/sec

We are calculating the time taken by the faster train to completely pass the lenght of slower one.
Hence, distance = length of the slower train + lenght of faster train = 270+330 = 600 metre

Time = 600/70/9 = 77.14 seconds

Option 8)

Correct Option: 8 Best Solution (0)