A person can swim in still water at 16 km/h. If the speed of water 8 km/h, how many hours will the man take to swim back against the current for 12 km?	Choose one.
A) 3	B) 1.5	C) 2.3	D) 1.8	E) 6

Rationale: "m = 16 s = 8 us = 16 - 8 = 8 d = 12 t = 12 / 8 = 1.5 answer : b"
Answer: B