A train requires 7 seconds to pass a pole while it requires 25 seconds to cross a station platform which is 378 meters long. Find the speed of the train. (a) 75.6 kmph (b) 75.4 kmph (c) 76.2 kmph (d) 21 kmph
Train require 25sec to cross 378m + its own lenght Hence it take 7 sec to cover its own lenght So 25-7 = 18 sec to cross platform only So 378/18= 21m/sec is its speed You can convert it also 75.6 km/hr