the perimeter of a rectangle field is 80 feet and its width is 10 feet. find the area of that field ?
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Answer:
300
Step-by-step explanation:
- p=2l+2w
- 80=2l+2×10
- 80=2l+20
- 80-20=2l
- 60=2l
- 60÷2
- l=30
- a=l×w
- a=30×10
- area=300
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