Re: [計量] 請問一題幾何文字題
※ 引述《bigggear (耷)》之銘言:
: A set of rectangles consists of exactly one rectangle of each possible size
: such rectangle the area is 24 and the length and width are integers.
: ColA
: The proportion of the rectangles in the set that have perimeter greater
: than 25
: ColB
: 0.5
: 感謝。
面積是24的長方形
長跟寬要是整數
所以,是因數問題
有1*24, 2*12, 3*8 ,4*6 四組
周長分別是 50, 28, 22, 20
所以,周長大於25的比例為 2/4 =0.5
答案應該是C
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06/07 23:46, , 1F
06/07 23:46, 1F
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