A swimmer is able to swim at a speed of 0.89 m/s in still water.
(b) The swimmer decides to swim 1470 m in a river having a current with a speed of 0.46 m/s. How long does this take if she swims with the current? Call this time t2.
(c) How long does it take her to swim the same distance against the current? Call this time t3.

Question

A swimmer is able to swim at a speed of 0.89 m/s in still water.
(b) The swimmer decides to swim 1470 m in a river having a current with a speed of 0.46 m/s. How long does this take if she swims with the current? Call this time t2. 
(c) How long does it take her to swim the same distance against the current? Call this time t3.

anonymous · Answer

I think you can just add and subtract the current speed to get a new speed.

anonymous · Answer

no way D:

anonymous · Answer

you mean the speed of the swimmer minus the speed of the current?

anonymous · Answer

If going against the current, yes; but add for going with the current.

anonymous · Answer

yaay that worked! thank you so much