１．A wire of 72 cm long of bent into a rectangle . If the length of the rectangle is 19cm,
find the width of the rectangle.註：這條數是應用題，請比埋條式我．
２．The temperature last night was 25'C and it is 34'C noon today. What is the percentage increase/decrease in temperature?註：這條數是應用題，請比埋條式我．
請幫我計下喱幾條數
2007-08-22 6:26 pm
回答 (2)
2007-08-22 6:35 pm
✔ 最佳答案
1.The width of the rectangle
=72/2-19cm
=36-19cm
=17(cm)
2.
The differemce of the temperature
=34-25'C
=9'C
The percentage increase
=9/25*100%
=36%
2007-08-22 10:06 pm
1. Let w cm be the width of the rectangle
2 * (19 + w) = 72
w + 19 = 36
w = 17
The width of the rectangle is 17cm
2. Percentage change = (34 - 25) / 25 * 100%
= 9/25 * 100%
=36%
The percentage increase in temperature is 36%
3. Profit percentage = (2-1)/1 * 100%
= 100%
2 * (19 + w) = 72
w + 19 = 36
w = 17
The width of the rectangle is 17cm
2. Percentage change = (34 - 25) / 25 * 100%
= 9/25 * 100%
=36%
The percentage increase in temperature is 36%
3. Profit percentage = (2-1)/1 * 100%
= 100%
收錄日期: 2021-04-13 13:03:12
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https://hk.answers.yahoo.com/question/index?qid=20070822000051KK01158