A rectangular field has to be fenced on three sides leaving a side 20 feet uncovered. If the area of the field is 680 sq.ft, how many feet of fencing will be required?
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Step-by-step explanation:
We have: l = 20 ft and lb = 680 sq. ft. So, b = 34 ft. ∴ Length of fencing = (l + 2b) = (20 + 680) ft = 880 ft.
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