Question

The current in a river is 1.0 meters/second. Britney swims 300 meters against the current. If she normally swims with a speed of 2.0 meters/second in still water, how long does it take her to complete the trip?

Answer 1

The answer is 300s I believe.

Answer 2

t = 300 seconds

Step-by-step explanation:

It is given that,

Speed of the current in the river,
`v_1=1\ m/s`

Distance covered by Britney, d = 300 m

Speed of Britney,
`v_2=2\ m/s`

It is mentioned that Britney swims against the current. Her downstream speed is given by :

`v=v_2-v_1`

`v=2-1`

v = 1 m/s

Let t is the time taken by her to complete her trip. t is given by :

`t=(d)/(v)`

`t=(300\ m)/(1\ m/s)`

t = 300 seconds

So, the time taken by her the complete her trip is 300 seconds. Hence, this is the required solution.