Problem solving radius and area.

[davie08]

Homework Statement

A circular garden is surrounded by fencing costing $5 per meter. If the total cost of the fencing is $100, find:

a)the radius of the garden

b)the area of the garden

Homework Equations

The Attempt at a Solution

all I know is that it would make sense if the whole garden is 20 meters around.

 

[davie08]

i screwed up but i might have this one lol.would the radius be about 3.18

 

[davie08]

and would the area be 31.35m

 

[cmgbruschi]

Yes, the radius is 10/pi meters which equals 3.18.

 

[cmgbruschi]

For the area calculation, don't round off the radius. I think you used the 3.18 as the radius in your area calculation. If you use the 10/pi as the radius instead and go through with the area calculation, the answer will be 31.83 rounded to two decimal places.