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| Math Central | Quandaries & Queries |
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Question from Simo: I have a piece of plate that is 2500mm x 8000mm x 20mm thick and costs $7693.00 what is the formula to work out what 1000mm x 1000mm is worth? |
Hi Simo,
I assume the plate is of uniform thickness so $2500 \times 8000$ square mm cost $\$7693.00.$ Thus the plate costs
\[\frac{\$7693.00}{2500 \times 8000} \mbox{ per square mm.}\]
Hence $1000 \times 1000$ square mm cost
\[\frac{\$7693.00}{2500 \times 8000}\times 1000\times 1000 = \$384.65.\]
I hope this helps,
Penny
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