QR question

[299678]

Advertisement - Members don't see this ad

I don't have any idea how to solve this problem from Achiever. I can't even visualize this question.

Q. a 120 m trapping net is stretched out into a retangular corral to front a flowing river. What should its width (being parallel to the riverbank) be to provide the largest capturing area?

answer is 30m

 

[lvtran]

It sounds like 120m is the total dimension including width and length. If its w is 30m, the length would also be 30m, making it a square with an area of 900 sq m, which is the largest area possible.