how many seconds will a train 100 meters long take to cross a bridge 170 meters long if the speed of the train is 36 kmph ?
"d = 100 + 170 = 270 s = 36 * 5 / 18 = 10 mps t = 270 / 10 = 27 sec answer : e"
divide(add(170, 100), multiply(36, const_0_2778))