Q30: A rectangular photograph is surrounded by a border that is 1 inch wide on each side. The total area of the photograph and the border is M square inches. If the border had been 2 inches wide on each side, the total area would have been (M + 52) square inches. What is the perimeter of the photograph, in inches? A. 34 B. 36 C. 38 D. 40 E. 42
答案为D.算来算去算不到选项中答案,那位高手,烦劳给与指点。谢谢 |