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 Post subject: Non-calculator QuPosted: Tue Jan 27, 2009 12:34 pm

Joined: Mon Feb 20, 2006 1:29 pm
Posts: 1806
Location: Berkshire
Came across following question, on GCSE Non-calculator.
at first glance it lookd do-able, but then it wasn't.

Surface area of a cube is 60cm(sq).
What is the volume?

Got to 10cm(sq).. for one side, but without a calculator I'd think it was pretty difficult to get the sq root of 10.

Maybe a different approach?

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 Post subject: Posted: Tue Jan 27, 2009 1:04 pm
Are you sure they haven't told you to leave it as surd? ie. Volume = 10 square root sign 10. They often do this.

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 Post subject: Posted: Tue Jan 27, 2009 2:03 pm

Joined: Mon Feb 20, 2006 1:29 pm
Posts: 1806
Location: Berkshire
It's ok, spoke to Maths teacher who advised it was a misprint should of read 600cm(sq). Which of course makes sense.

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 Post subject: Posted: Tue Jan 27, 2009 2:08 pm

Joined: Wed Oct 29, 2008 12:40 am
Posts: 887

numbers all did not add up and brain very tired now.
but at least realise brain not useless.

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 Post subject: Posted: Tue Jan 27, 2009 2:13 pm

Joined: Mon Feb 20, 2006 1:29 pm
Posts: 1806
Location: Berkshire

Tis true

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