Question

You wish to swim across a small river to your friend on the other side. The river is 30 m wide and you begin to swim straight across it at a speed of 1 m/s. The current in the river is 0.5 m/s and so the river carries you downriver as you swim. How far downriver in meters are you when you get to the other side?

Answer 1

as in 1sec he covers a distance of metre so in 30 sec he covers the whole river that is 30 m.
as there downstream also in 30 sec you cover a distance of 15 m in downstrem

you can do this thereodically

Answer 2

33.54 is incorrect

Answer 3

15 m downriver