a train is running at a speed of 40 km / hr and it crosses a post in 18 seconds . what is the length of the train ?
speed of the train , v = 40 km / hr = 40000 / 3600 m / s = 400 / 36 m / s time taken to cross , t = 18 s distance covered , d = vt = ( 400 / 36 ) × 18 = 200 m distance covered is equal to the length of the train = 200 m correct answer is 200 metres
multiply(18, multiply(40, const_0_2778))