A square with sides of 4 for perimeter and area of a rectangle with length 2 width 6<span />
It's already in the simplest form.
Please, find the solution atached in JPG format
Step-by-step explanation:
1kg=1000g
400kg=400*1000
=400000
Therefore 400kg =400000g
By Green's theorem, the integral of
along
is

which is 6 times the area of
, the region with
as its boundary.
We can compute the integral by converting to polar coordinates, or simply recalling the formula for a circular sector from geometry: Given a sector with central angle
and radius
, the area
of the sector is proportional to the circle's overall area according to

so that the value of the integral is
