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PostPosted: Sun Mar 25, 2012 7:58 pm 
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Joined: Sat Oct 10, 2009 3:04 pm
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if anyone has this book can you explain how the answer is 80cm cubed as states in the book , i dont know if the question is being worded badly or i am just being stupid here but i cant see how it snot 160cm cubed :oops:


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PostPosted: Sun Mar 25, 2012 9:39 pm 
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As far as i can see, that's an error in the book. Most of the questions in this book say sides of '1cm', which would give 80, with 2cm per side its definitely 160.


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PostPosted: Mon Mar 26, 2012 9:59 am 
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What's the question? Do you mean cubic centimetres (not centimetres cubed) and is it about volume, not surface area?


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PostPosted: Mon Mar 26, 2012 6:11 pm 
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sorry i cant really post up the net but theres 40 squares and it says the side of each square is 2cm , what is surface area?

stocky , thanks i think and hope the book is wrong aswell but 1cm a side would be 40cm ?

also it leaves ---cm cubed as a space for the answer , now i would have thought volume was cubed and surface area was squared?


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PostPosted: Tue Mar 27, 2012 12:20 am 
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Hi Chelmsford Dad - sorry for confusing you more!! Yes at 1cm it would be 40cm2. I do think there is still an error though as based on 2cm its definitely 160 and yes you are right area is cm2, volume is cm3 - this question asks for area.


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