Two trains A and B each of length 100m running on parallel tracks.One overtakes other in 20seconds.One cross other in 10 seconds.Calculate velocity of each train.?
let velo of trains u and v m/s resp.rel.velo of overtaking =u - v and crossing = u +v, to. dist =100+100=200m , time = t. dist / velo = 20 =200 / u - v =u-v=10..(1) , and 10 = 200/u+v = u+v=20..(2) sol 1 2 u=15 m/s and v=5m/s