1. Train A travelling at 126 km/ hour speed, completely crosses Train B in 9 seconds. Train B is half the length of Train A and is travelling at a speed of 90 km/ hour in the opposite direction (towards Train A). How much will Train A take to cross a platform of length 690 metres ?
Write Comment
Comments
By: anil on 05 May 2019 01.41 am
Let length of train B = $$x$$ m => Length of train A = $$2x$$ m Speed of train A = 126 km/h = $$126 imes frac{5}{18} = 35$$ m/s Speed of train B = 90 km/h = $$90 imes frac{5}{18} = 25$$ m/s Since, the trains are moving in opposite direction, relative speed = 35 + 25 = 60 m/s Time taken = 9 sec => $$frac{2x + x}{60} = 9$$ => $$3x = 9 imes 60 = 540$$ => $$x = frac{540}{3} = 180$$ m Thus, length of train A = 360 m $$ herefore$$ Time taken by train A take to cross a platform of length 690 metres = $$frac{360 + 690}{35} = frac{1050}{35}$$ = $$30$$ seconds
Terms And Service:We do not guarantee the accuracy of available data ..We Provide Information On Public Data.. Please consult an expert before using this data for commercial or personal use