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?
Answers:
A) 16  B) 36  C) 42  D) 48  E) 54

Rationale: 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
Answer: A