A person can swim in still water at 4 km/h. If the speed of water 2 km/h, how many hours will the man take to swim back against the current for 16km? Select
A) 3	B) 6	C) 8	D) 9	E) 7
M = 4   S = 2   US = 4 - 2= 
<gadget id="calculator">4 - 2</gadget>
<output>2</output>
2   D= 16   T = 16/2= 
<gadget id="calculator">16/2</gadget>
<output>8</output>
8   Answer:8
<result>C</result>
A person can swim in still water at 4 km/h. If the speed of water 2 km/h, how many hours will the man take to swim back against the current for 16km?