# speed

Joined Dec 29, 2004
83
Hey,
I need some suggestions to approach the problem:

A lifeguard standing on a tower throws a buoy to a swinner 5m from the tower. The lifeguard, positioned 3 m above the water, pulls in the rope at a speed of 1m/s.
How fast is the swinner coming to the shore when he is at 4m from the water edge?

thanks

#### wireless

Joined Sep 10, 2005
3
Originally posted by braddy@Sep 9 2005, 11:48 PM
Hey,
I need some suggestions to approach the problem:

A lifeguard standing on a tower throws a buoy to a swinner 5m from the tower. The lifeguard, positioned 3 m above the water, pulls in the rope at a speed of 1m/s.
How fast is the swinner coming to the shore when he is at 4m from the water edge?

thanks
[post=10227]Quoted post[/post]​

First, draw a diagram. It should be a triangle with 3m on one side (the height of the life guard), 4m on another side (distance the swimmner is from the edge) and
with a little geometry the hypotenuse is 5m. These lengths will give you the angles of the triangle. From here, all you need to find is the COSINE of the angle.

#### Brandon

Joined Dec 14, 2004
306
Since it never said the swimmer grabbed the bouy, you could say 0.

#### GnatWest

Joined Apr 24, 2004
4
there seems to be some missing info on this question based on your other posts