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 7 km?
Pick one.
A) 3.0	B) 3.25	C) 3.5	D) 3.75	E) 4.0
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  7/2= 
<gadget id="calculator"> 7/2</gadget>
<output>7/2 = around 3.5</output>
3.5 hours.   The answer is 3.5.
<result>C</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 7 km?