a train 360 m long is running at a speed of 45 km / hr . in what time will it pass a bridge 290 m long ?
"speed = 45 * 5 / 18 = 25 / 2 m / sec total distance covered = 360 + 290 = 650 m required time = 650 * 2 / 25 = 52 sec answer : b"
divide(360, multiply(subtract(45, 290), const_0_2778))