12=2s
s=6
if the shape is a square, then all sides must be the same so the top and bottom would just be 2s, which would be equal to 12 and divide that by 2 to get your answer of what s is.
A because if you apply Newton's law to this problem, then the longer rope (B) would swing farther but would get to the point of destination slower than A would. Hope this awncered ur problem.
773.77*0.5=386.88 hope i helped
