omg.. i dun understand tis question.. plz help~~

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- Jun 20th 2006, 01:14 AMxiaoza wood is a circle or square?????
omg.. i dun understand tis question.. plz help~~

- Jun 20th 2006, 03:40 AMCaptainBlackQuote:

Originally Posted by**xiaoz**

to a common base (metres and kgm), find the volume of the wood and divide

the mass by that volume.

The wood is 1.2m by 15cm by 3mm, or converting all to metres it is

1.2m by 0.15m by 0.003m. So the volume is 1.2x0.15x0.003=0.00054 cubic metres.

Now the mass of the wood is 340g, which is 0.34kg.

So the density is 0.34/0.00054=629.63 kg/cubic metre,

which is about 63% the density of water.

RonL - Jun 20th 2006, 04:47 AMxiaoz
but y the ans says tis ?

- Jun 20th 2006, 06:58 AMCaptainBlackQuote:

Originally Posted by**xiaoz**

If so I suspect that either there is a misprint or you are looking at the

answer to another question.

The question here is asking for a density - which will have dimensions

of mass per unit volume in some appropriate units.

Also it is asking for two decimal places in the answer.

RonL - Jun 21st 2006, 03:17 AMxiaoz
no.. i nv mislook.. i tin the ans is wrong..