how many seconds will a train 140 meters long take to cross a bridge 150 meters long if the speed of the train is 36 kmph ?
"d = 140 + 150 = 290 s = 36 * 5 / 18 = 10 mps t = 290 / 10 = 29 sec b"
divide(add(150, 140), multiply(36, const_0_2778))