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Length is 300 m and breadth is 100 m Length = 3x nd breadth x perimeter =2(3x+x)=800 4x=400 x=100 so length is 300m and breadth is 100m area=lb 300*100=30000m²

Area of the field is 30000m² and length is 300m. let the breadth be x. ∴length = 3x perimeter of a rectangle=2(l+b) ∴800=2(x+3x) 800=8x ∴x=100 ∴length=3×breadth=3×100=300. area of a rectangle=length×breadth ∴area=300×100=30000 hope i helped :)