how many seconds will a train 70 meters long take to cross a bridge 80 meters long if the speed of the train is 36 kmph ?
"explanation : d = 70 + 80 = 150 s = 36 * 5 / 18 = 10 mps t = 150 / 10 = 15 sec answer : option d"
divide(add(80, 70), multiply(36, const_0_2778))