A swimmer can swim in still water at 4 km/h. If the speed of the water current is 2 km/h, how many hours will the swimmer take to swim against the current for 3 km?
Pick:  A) 1.5  B) 1.75  C) 2.0  D) 2.25  E) 2.5
The swimmer can swim against the current at a speed of 4-2= 
<gadget id="calculator">4-2</gadget>
<output>2</output>
2 km/h.   The time it will take is  3/2= 
<gadget id="calculator"> 3/2</gadget>
<output>3/2 = around 1.5</output>
1.5 hours.   The answer is 1.5.
<result>A</result>
A swimmer can swim in still water at 4 km/h. If the speed of the water current is 2 km/h, how many hours will the swimmer take to swim against the current for 3 km?