how many seconds will a train 100 meters long take to cross a bridge 150 meters long if the speed of the train is 18 kmph ?
"d = 100 + 150 = 250 s = 18 * 5 / 18 = 5 mps t = 250 / 5 = 50 sec d ) 50 sec"
divide(add(150, 100), multiply(18, const_0_2778))