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How to solve the math P43 in the homework book of the third summer vacation of People's Education Press?
(1) The length is 65/5 = 13m.

(2) Take its width as the maximum side length and its area as 5 * 5 = 25m2.

(3) The area of spinach is equal to = 65-25 = 40m2.

(4) That is, the perimeter of the rectangle =( 13-5)*2+5*2=26.