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Hi there! Have questions about your homework? At Brainly, there are 60 million students who want to help each other learn. Questions are usually answered in less than 10 minutes. Try it for yourself by posting a question! :D

Let breath be x so length will be 3x perimeter of a rectangle is 2(l+b) but here perimeter = 800m therefore 2(3x+x) = 800m that equals to 2(4x)=800m 8x=800m therefore x=800/8 that equal to x=100 now substituting the value 3x=300 x=100 so length=300m and breath=100m now area of rectangle = l * b => 300*100 => 30,000msq.

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