Is it possible to bend a 20cm length of wire into the shape of a rectangle which has an area f 30cm^2?

Question

I don't know how to approach this at all.

Answer 1

It's impossible.

You have:
l x w = 30
l + w = 20

w=20 - l

l x (20 - l) = 30

You solve this equation and get impossible solution.