PPSC Past Paper Excise & Taxation Inspector Additional Directorate Excise, 2018 Solved MCQs, Everyday Science MCQs, PPSC Solved Past Papers MCQsIf length 3 cubic Inch, width is 3 cubic inch height, 3 cubic inch than tell the volume?A. 27 cubic Inches B. 28 cubic inches C. 30 cubic inches D. None of these The average age of a family of 10 members is 20 years. If the age of the youngest member of the family is 10 years, then the average age of the members of the family just before the birth of the youngest member was approximately?The metal used to recover copper from a solution of copper sulphate is?