a train 360 m long is running at a speed of 45 km / hr . in what time will it pass a bridge 160 m long ?
"speed = 45 * 5 / 18 = 25 / 2 m / sec total distance covered = 360 + 160 = 520 m required time = 520 * 2 / 25 = 41.6 sec answer : a"
divide(360, multiply(subtract(45, 160), const_0_2778))