A train which length is 100meter and a person comes from opposit direction by 5 kilometer/hours speed .train passing of man in 6 secand then the find of train speed ?with explanation
Simple logic is that relative speed always increases when both objects travel in opposite direction.
I am right na
Let the speed of the train be x km/hr.
Length of the train = 100 m = 0.1 km .
Speed of the person = 5 km/hr .
Effective speed = (x+5) km/hr.
time taken = 6 sec = [6/(60*60)] hr = 1/600 hr .
(dist/speed ) = time .
(.1/ x+5) = (1/ 600)
0.1* 600 = x+5
60 = x+5
x = 60 - 5
= 55 km/hr.
A-45km/h, B-55 ,C-50,D-60