A train 200 m long passes a pole in 10 seconds. How long will it take to pass another train 300 m long running in the opposite direction at a speed of 30 km/h?
Speed of the first train= 200 /10 = 20 m/s Speed of the second train= 30 km/h = 30×1000 /3600 =8.33 m/s Relative speed= 20 +8.33= 28.33 m/s Total distance= 200+300 = 500 meters Time= 500/ 28.33= 17.66 seconds (rounded to 18 seconds)
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