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Sample Paper \( ( 2018 - 19 ) \) 18. A hemispherical cup of radius 4\( \mathrm { cm } \) is filled to brim with coffee. is then poured intt a vertical cone of radius 8\( \mathrm { cm } \) and height 16\( \mathrm { cm } . \) What percentage of the cone remains empty \( O R \)

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