document.write( "Question 1205077: It takes about 3 bundles of grass to weave a circular mat of diameter 1½m. How many bundles to the nearest bundle, does it take to weave a similar mat of diameter 2½m? \n" ); document.write( "
Algebra.Com's Answer #841709 by ikleyn(52848)\"\" \"About 
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\n" ); document.write( "It takes about 3 bundles of grass to weave a circular mat of diameter 1½m.
\n" ); document.write( "How many bundles to the nearest bundle, does it take to weave a similar mat of diameter 2½m?
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\n" ); document.write( "\n" ); document.write( "        The solution in the post by MathLover1 is INCORRECT.\r
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document.write( "The proportion should relate the areas of the mats, OBVIOUSLY.\r\n" );
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document.write( "    \"3%2Fx\" = \"%28pi%2Ar%5E2%29%2F%28pi%2AR%5E2%29\",\r\n" );
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document.write( "or \r\n" );
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document.write( "    \"3%2Fx\" = \"%28%281.5%2F2%29%5E2%29%2F%28%282.5%2F2%29%5E2%29\".\r\n" );
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document.write( "From this proportion\r\n" );
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document.write( "    x = \"3%2A%282.5%5E2%2F1.5%5E2%29\" = 8.333.\r\n" );
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document.write( "Round it to the closest greater integer number to have a necessary margin.\r\n" );
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document.write( "ANSWER.  9 bundles of grass is needed.\r\n" );
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