Afarmer wants to build a pen for his sheep. one side of the pen will be a river. the sheep need about 2000 m2 of area to graze. about what length (x) and width (y) should the organization use to use the least amount of fencing possible?
a) length = 43 m, width = 46 m
b) length = 50 m, width = 40 m
c) length = 63 m, width = 32 m
d) length = 100 m, width = 20 m