我唔識例式....=3=
1.An octopus card has lenght 8.5 cm and breadrth 5.4 cm.Suppose the card is rectangular in shape,find its area.
2.Forenec has apiece of sticker which is trapezoidal.the shorter base of the sticker is 1.5 cm,the longer base is 3 cm and the height is 4 cm.what is the area of the sticker?
3.A notebook computer has lenght 30 cm ,breadth 25 cm and thickness 2.5 cm.suppose this computer is a cuboid,find its volume.
英數(暑期作業)
2007-08-13 12:07 am
回答 (2)
2007-08-13 12:17 am
✔ 最佳答案
1.octopus card's area:(length*breadth)
8.5*5.4
=45.9cm sq
2. area of the sticker:
(upper length+lower length)*height/2
(1.5+3)*4/2
=9cm sq
3.volume of the notebook computer:
(length*breadth*thickness)
30*25*2.5
=1875cm sq
希望幫到你LA
參考: 自己
2007-08-13 12:20 am
你好似打錯左好多字，第1題打錯左長(length)同闊(breadth)，其他o既題目都有錯字，搞到我睇唔明。我憑其他字o既意思去分析。
1.8.5cmX5.4cm=45.9cm2
2.1.5cmX3xm=4.5cm2
3.30cmX25cmX2.cm=1875cm3
2007-08-12 16:22:20 補充：
2.(1.5cm 3cm)X4cm/2=9cm2
1.8.5cmX5.4cm=45.9cm2
2.1.5cmX3xm=4.5cm2
3.30cmX25cmX2.cm=1875cm3
2007-08-12 16:22:20 補充：
2.(1.5cm 3cm)X4cm/2=9cm2
參考: 自己
收錄日期: 2021-04-18 23:01:22
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https://hk.answers.yahoo.com/question/index?qid=20070812000051KK02849