A person can swim in still water at 10 km/h. If the speed of water 8 km/h, how many hours will the man take to swim back against the current for 16km? Choose one.
A) 3  B) 7  C) 5  D) 8  E) 6
M = 10   S = 8   US = 10 - 8= 
<gadget id="calculator">10 - 8</gadget>
<output>2</output>
2   8= 16   T = 16/2= 
<gadget id="calculator">16/2</gadget>
<output>8</output>
8   Answer: 8
<result>D</result>
A person can swim in still water at 10 km/h. If the speed of water 8 km/h, how many hours will the man take to swim back against the current for 16km?