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Two trains, each 100 m long, moving in opposite directions, cross each other in 8 seconds. If one is moving twice as fast the other, then what is the speed of the faster train ?

Let the speed of the slower train be x m/sec.

Then, speed of the faster train = 2x m/sec.

Relative speed = (x + 2x) m/sec = 3x m/sec.

(100 + 100) / 8 = 3x

So, x = 25/3

So, speed of the faster train = 50/3 m/sec

Two trains 140 m and 160 m long run at the speed of 60 km/hr and 40 km/hr respectively in opposite directions on parallel tracks. What is the time (in seconds) which they take to cross each other?

Two trains each 414 meter long, are running in opposite directions on parallel tracks. If their speeds are 39 km/hr and 69 km/hr respectively, what would be the time taken by the slower train to pass the driver of the faster one?

The ratio between the speeds of two trains is 7 : 8. If the second train runs 400 km in 4 hours, then what is the speed of the first train ?

Two trains each 365 meter long, are running in same directions on parallel tracks. If their speeds are 44 km/hr and 64 km/hr respectively, then what would be the time taken by the faster train to pass the driver of the slower one?