a train with 1200 m crosses a tree in 120 sec , how much time will i take to pass a platform 700 m long ?
s = 1200 / 120 s - 10 m / sec total length = 1900 m t = d / s t = 1900 / 10 t = 190 sec answer c
divide(add(1200, 700), divide(1200, 120))