Walking at 5/6th of its usual speed a cab is 8mnts late. Find its usual time to cover the journey?  Choose the correct choice from the following answers.
A) 25 m
B) 45 m
C) 40 m
D) 50 m
E) 62 m

Rationale: "new speed = 5 / 6 th of usual speed new time = 6 / 5 th of usual time 6 / 5 ut - ut = 8 m ut / 5 = 8 m ut = 40 m answer is c"
Answer: C