A rectangular field is to be fenced on three sides, leaving a side of 20m uncovered. If the area is 680m2 ,find length of fencing (in m) needed

2 answers

L*W = 680 m^2.
L*20 = 680, L = 34 m.

2L + W = 2*34 + 20 = 88 m. needed.
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