Tuesday

January 27, 2015

January 27, 2015

Posted by **jason** on Wednesday, February 13, 2008 at 1:45am.

im having some problems with my word problem.

Ann regularly swam .4 km in 20 min at the school pool. Swimming in a river against the current, she swan .25 km in the same time it took Ann to swim .75 km with the current. Dind the speed of the current and the time it took ann to swim.

help please!

- algebra -
**Quidditch**, Wednesday, February 13, 2008 at 3:35amFirst find the speed at which Ann swims.

0.4km/20min = 0.02km/m

Let C be the speed of the current

Ann's upstream time is:

0.25km/(0.02km/m - C)

Ann's downstream time is:

0.75km((0.02km/m + C)

The problems states that they are equal.

0.25km/(0.02km/m - C) = 0.75km/(0.02km/m + C)

Solve for C. It will be in km/m.

- algebra -
**Quidditch**, Wednesday, February 13, 2008 at 3:40amSubstitute the value you found for C into either equation to get the one way time. The problem seems to indicate that you need the total time. That is the time it took Ann to swim up and back. Be sure to indicate that time is for one direction and the total time is twice that.

**Answer this Question**

**Related Questions**

Word Problem - A swimming pool 25 m long, 15 m wide, and 150 cm deep is being ...

physics - If you have swam one lap in a swimming pool, that means you have swam ...

Physics - If you have swam one lap in a swimming pool, that means you have swam ...

GTCC - If you have swam one lap in a swimming pool, that means you have swam ...

physics - If you have swam one lap in a swimming pool, that means you have swam ...

physics - If you have swam one lap in a swimming pool, that means you have swam ...

guilford tech - If you have swam one lap in a swimming pool, that means you have...

Physics - The swim portion of a triathlon takes place in a river and is an out-...

Physics - Water flows into a swimming pool at the rate of 5 . 25 gal / min. If ...

Physics - If you have swam one lap in a swimming pool, that means you have swam ...