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?	Select the correct option:
A) 1.2  B) 1.4  C) 1.6  D) 1.8  E) 2

Rationale: the swimmer can swim against the current at a speed of 4 - 1 = 3 km / h . the time it will take is 6 / 3 = 2 hours . the answer is e .
Answer: E