a train is 485 meter long is running at a speed of 45 km / hour . in what time will it pass a bridge of 140 meter length
"explanation : speed = 45 km / hr = 45 * ( 5 / 18 ) m / sec = 25 / 2 m / sec total distance = 485 + 140 = 625 meter time = distance / speed = 625 ∗ 2 / 25 = 50 seconds option d"
divide(add(485, 140), divide(multiply(45, const_1000), const_3600))