document.write( "Question 1011264: A hollow sphere is made of metal 1.5cm thick and has an external diameter of 22cm. Calculate the volume of metal used to make the hollow sphere. (Take pi=3)\r
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Algebra.Com's Answer #626882 by josgarithmetic(39620)\"\" \"About 
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Inside diameter is \"22-2%2A1.5=19\", that part being hollow or empty of any metal, and we usually know pi to at least three significant figures.\r
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