Question

The number of km in the perimeter of a park is 8 greater than the number of square km in its area. What is the width?

Answer 1

I tried this:

Explanation:

I would try with a circular park....it is easier...
The perimeter is:
`P=2pir`
The area is:
`A=pir^2`
from the problem we know that:
`P=8A`
or
`2cancel(pi)cancel(r)=8*cancel(pi)r^cancel(2)`
`r=2/8=1/4km`
so the width or diameter of the park will be:
`w=2r=2*1/4=1/2km`