how long does a lorry 200 m long traveling at 80 kmph takes to cross a bridge of 200 m in length ?
d = 200 + 200 = 400 m s = 80 * 5 / 18 = 200 / 9 t = 400 * 9 / 200 = 18 sec answer : e
divide(add(200, 200), multiply(80, const_0_2778))