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Cylinder and prism do not go exactly

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by maihuna » Wed Jul 29, 2009 9:25 am
A column is formed by inserting a block of wood in a closely fitting cylindrical case, and then filling up the surrounding space with concrete. If the wood is in the shape of a right prism 2m 75cm long on a rectangular base whose sides are 32cm and 24cm find the required amount of concrete to the nearest cubic decimeter.

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by maihuna » Thu Jul 30, 2009 4:34 am
any taker for this one....
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by yogami » Thu Jul 30, 2009 5:49 am
Well I would assume the diameter of the base of the cyllinder to be at least the diagonal of the base of the prism sqrt(32^2 + 24^2) and then proceed from there. And then find vol of cyllinder, volume of prism which is 1.2 * base * height of the triangle of the prism * 0ne of the lengths .
nNow i will try both lengths in the <one of the lengths > part and see what volumes i end up wth based on the answers and chose that one
200 or 800. It don't matter no more.
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by maihuna » Thu Jul 30, 2009 10:39 am
yogami wrote:Well I would assume the diameter of the base of the cyllinder to be at least the diagonal of the base of the prism sqrt(32^2 + 24^2) and then proceed from there. And then find vol of cyllinder, volume of prism which is 1.2 * base * height of the triangle of the prism * 0ne of the lengths .
nNow i will try both lengths in the <one of the lengths > part and see what volumes i end up wth based on the answers and chose that one
hummm ..lot of this that....
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by maihuna » Fri Jul 31, 2009 9:40 am
takers
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