a problem :)

[Valentas]

What shortest length a fence must be in order to fence in 400 m^2 area?

 

[Valentas]

Do some work; try a few "L * W = 400" and see what you get...

I have to use a derivative here because it is from derivatives part.

 

[Deleted member 4993]

What shortest length a fence must be in order to fence in 400 m^2 area?

Length of frnce = F = 2* (L + W)

Area = A = L * W

L = A/W

F = 2*(A/W + W)

Now continue.....