Batch type extractor is used to leach oil from $10kg$ sunflower seed. $2kg$ hexane is used per $kg$ sunflower seed. Sunflower seed contains $70\%$ insoluble solid and amount of oil retained in the insoluble solid as is expressed in the table.

$\backslash$table$[[$Oil concentration,$$nsoluble solid$/$ oil$],[0\mathrm{.}05,30],[0\mathrm{.}10,12],[0\mathrm{.}15,7\mathrm{.}5],[0\mathrm{.}30,20,5$