how many seconds will a train 100 meters long take to cross a bridge 250 meters long if the speed of the train is 36 kmph ?
"d = 100 + 250 = 350 s = 36 * 5 / 18 = 10 mps t = 350 / 10 = 35 sec answer : b"
divide(add(250, 100), multiply(36, const_0_2778))