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Could someone please explain the Algebra approach to this problem:
A 120 m trapping net stretched out into a 3-sided rectangular corral is used to front a flowing river. What value of widths (w), being parallel to the riverbanks, will provide the corral with largest capturing area?
A. w = 15 m
B. w = 20 m
C. w = 25 m
D. w = 30 m
E. w = 35 m
I'm stuck as to how the author came up with an answer for this one. Thanks in advance!
A 120 m trapping net stretched out into a 3-sided rectangular corral is used to front a flowing river. What value of widths (w), being parallel to the riverbanks, will provide the corral with largest capturing area?
A. w = 15 m
B. w = 20 m
C. w = 25 m
D. w = 30 m
E. w = 35 m
I'm stuck as to how the author came up with an answer for this one. Thanks in advance!