推 GODDAMN:我覺得是E，因為兩個條件給的都是how much more.. 10/19 15:32
→ GODDAMN:還是算不出來答案要的是多少錢吧? 10/19 15:33
→ min2:我覺得你說的是對的...我忽略了基本的價錢了... 10/19 16:43
推 jjhgfr:應該是跟長度的平方成正比吧... 10/19 19:11
→ jjhgfr:also proportional to the square of its length 10/19 19:14
※ 引述《rnrn ()》之銘言：
: The cost of a square slab is proportional to its thickness and also
: proportional to the square of its length. What is the cost of a square slab
: that is 3 meters long and 0.1 meter thick?
正方形木板的價錢是跟他的厚度成比例的,也跟他的長度成比例.
問一個長3公尺.厚0.1公尺的多少錢
: (1) The cost of a square slab that is 2 meters long and 0.2 meter thick is
: $160 more than the cost of a square slab that is 2 meters long and 0.1 meter
: thick.
一個2公尺長,0.2公尺厚的木板比一個2公尺長,0.1公尺厚的木板多160塊
: (2) The cost of a square slab that is 3 meters long and 0.1 meter thick is
: $200 more than the cost of a square slab that is 2 meters long and 0.1 meter
: thick.
一個3公尺長,0.1公尺厚的木板比一個2公尺長,0.1公尺厚的木板多200塊
: 嗯! 其實我是看不太懂題目的意思
: 請大家幫我解答 謝謝^^
答案是C嗎? 要兩個選項才能知道價錢跟長,厚的比率各是多少
應該是這樣吧 希望有回答到你的問題~~~
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※ 編輯: min2 來自: 210.64.211.107 (10/19 14:37)