how long does a train 110 m long traveling at 90 kmph takes to cross a bridge of 170 m in length ?
"d = 110 + 170 = 280 m s = 90 * 5 / 18 = 50 / 2 t = 280 * 2 / 50 = 11.2 sec answer : d"
divide(add(110, 170), multiply(90, const_0_2778))