Walking at 50% of his usual speed a man takes 24 minutes more to cover a distance. What is his usual time to cover this distance?  Choose the correct choice from the following choices
A) 24 B) 36 C) 42 D) 48 E) 54

Rationale: "speed is inversly proprtional to time walking at 50 % of speed meand 1 / 2 s takes 2 t . it takes 24 minutes extra to cover the distance . then 2 t = t + 24 t = 24 . option a is correct"
Answer: A