A person can swim in still water at 12 km/h. If the speed of water 6 km/h, how many hours will the man take to swim back against the current for 6km? Pick.
A) 3
B) 4
C) 5
D) 6
E) 7
M = 12   S = 6   US = 12 - 6= 
<gadget id="calculator">12 - 6</gadget>
<output>6</output>
6   6= 36   T = 36/6= 
<gadget id="calculator">36/6</gadget>
<output>6</output>
6 Answer:6
<result>D</result>
A person can swim in still water at 12 km/h. If the speed of water 6 km/h, how many hours will the man take to swim back against the current for 6km?