(4.5-x)(4-x)= 14，
X 1 =8 (s) x 2 =0.5 ..
Answer: The path width should be 0.5m;
(2) 400÷80=5 pieces in length and 350÷80=4 pieces in width and more than 30cm,
∴ There is still a gap of 30×400 left,
∵30