walking at 40 % of his usual speed a man takes 24 minutes more to cover a distance . what is his usual time to cover this distance ?
speed is inversly proprtional to time walking at 40 % of speed meand 2 / 5 s takes 5 / 2 t . it takes 24 minutes extra to cover the distance . then 5 / 2 t = t + 24 5 t = 2 t + 48 3 t = 48 t = 16 . option a is correct
divide(24, subtract(divide(const_1, divide(40, const_100)), const_1))