A swimmer can swim in still water at 4 km/h. If the speed of the water current is 1 km/h, how many hours will the swimmer take to swim against the current for 6 km?	Choose the correct answer:
A) 1.2 B) 1.4 C) 1.6 D) 1.8 E) 2
The swimmer can swim against the current at a speed of 4-1= 
<gadget id="calculator">4-1</gadget>
<output>3</output>
3 km/h.   The time it will take is  6/3= 
<gadget id="calculator"> 6/3</gadget>
<output>2</output>
2 hours.   The answer is 2.
<result>E</result>
A swimmer can swim in still water at 4 km/h. If the speed of the water current is 1 km/h, how many hours will the swimmer take to swim against the current for 6 km?