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 14km?
Choose the correct choice from the following choices:
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= 14   T = 14/2= 
<gadget id="calculator">14/2</gadget>
<output>7</output>
7   Answer:7
<result>E</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 14km?