Suki wants to build a 60 ft. long rectangular sheep pen in back of her barn. if she bought 150 feet of fencing and used her barn wall as one side of the pen equaling the width, what would be the area of the sheep pen?

Length of the sheep pen =60ft

150 ft of fencing bought

One side of rectangular sheep pen is covered with barn which is equaling the  width

perimeter of rectangular sheep pen = 2(length +width)

length need to covered is 2 Length+ width

150 =2 length+width

150 = 2 x60 +width

150-120= width

30= width

Area of rectangle = 60 x 30

180 ft2