A man swims downstream 24 km and upstream 12 km taking 6 hours each time, what is the speed of the man in still water?  Options
A) 5 B) 8 C) 10 D) 4 E) 3

Rationale: "24 - - - 6 ds = 4 ? - - - - 1 12 - - - - 6 us = 2 ? - - - - 1 m = ? m = ( 4 + 2 ) / 2 = 3 answer : e"
Answer: E