how long does a train 110 m long traveling at 72 kmph takes to cross a bridge of 170 m in length ?
"d = 110 + 170 = 280 m s = 72 * 5 / 18 = 20 t = 280 * 1 / 20 = 14 sec answer : d"
divide(add(110, 170), multiply(72, const_0_2778))